UK Radio Frequency Map

HamAmateur Radio (UK)136 kHz – 250 GHz

LF / MF bands135.7 kHz – 1.9 MHz

Band	Frequency	Notes
2200 m	135.7 – 137.8 kHz	Secondary, 1 W EIRP
630 m	472 – 479 kHz	Secondary, 5 W EIRP
160 m	1.810 – 2.000 MHz	Primary above 1.850 MHz in UK

HF bands3.5 – 29.7 MHz

Band	Frequency	Notes
80 m	3.500 – 3.800 MHz	CW `3.500–3.570`, data `3.570–3.620`, SSB `3.620–3.800`
80 m RAYNET	3.660 / 3.735 MHz	RAYNET emergency net calling (SSB)
80 m QRP calling	3.690 MHz	SSB QRP centre of activity
60 m	5.258 – 5.406 MHz	UK: 11 discrete channels + 5.3515–5.3665 segment
60 m WSPR	5.288.700 MHz	WSPR beacon slot
40 m	7.000 – 7.200 MHz	CW `7.000–7.040`, data `7.040–7.060`, SSB `7.060–7.200`
40 m QRP calling	7.030 / 7.090 MHz	CW / SSB QRP calls
40 m RAYNET	7.110 / 7.130 MHz	RAYNET emergency net
30 m	10.100 – 10.150 MHz	CW / data only
30 m FT8 / WSPR	10.136 / 10.1387 MHz
20 m	14.000 – 14.350 MHz	CW `14.000–14.070`, data `14.070–14.099`, SSB `14.101–14.350`
20 m FT8	14.074 MHz	Global FT8 calling
20 m QRP calling	14.060 / 14.285 MHz
17 m	18.068 – 18.168 MHz
17 m FT8	18.100 MHz
15 m	21.000 – 21.450 MHz
15 m FT8	21.074 MHz
12 m	24.890 – 24.990 MHz
12 m FT8	24.915 MHz
10 m	28.000 – 29.700 MHz	FM repeaters 29.510–29.690 MHz
10 m FM calling	29.600 MHz	UK simplex FM call channel
10 m FT8	28.074 MHz

International distress-watch conventions: 3.760, 7.110, 14.300, 18.160, 21.360 MHz — IARU Global Centre of Emergency-Activity.

VHF bands50 – 148 MHz

Band / channel	Frequency	Notes
6 m	50.000 – 52.000 MHz	Primary 50.0–50.5, secondary above
6 m SSB calling	50.150 MHz	USB
6 m FM calling	51.510 MHz	UK simplex
6 m FT8	50.313 MHz
4 m	70.000 – 70.500 MHz	UK-specific (not in ITU region 1 plan)
4 m FM calling	70.450 MHz
4 m SSB calling	70.200 MHz	USB
2 m	144.000 – 146.000 MHz	SSB `144.000–144.500`, FM above
2 m SSB calling	144.300 MHz	USB
2 m FM calling	145.500 MHz (S20)	Primary UK 2 m call channel
2 m APRS	144.800 MHz	EU APRS
2 m FT8	144.174 MHz
2 m RAYNET	145.550 MHz (S22)	RAYNET emergency simplex
2 m Emergency	145.525 MHz (S21)	IARU Region 1 emergency centre of activity
2 m repeater inputs	145.000 – 145.1875 MHz	RV48–RV63, –600 kHz shift
2 m repeater outputs	145.600 – 145.7875 MHz	25 kHz spaced

2 m repeater access: historic 1750 Hz tone burst now largely replaced by CTCSS. UK regional tones (for repeater keying & selection) —

Tone (Hz)	Letter	Region
67.0	A	SW England & S Wales
71.9	B	SE England
77.0	C	E England
82.5	D	N England
88.5	E	S Scotland & NE England
94.8	F	N Scotland & NI
103.5	G	Wales & W Midlands
110.9	H	Central / Midlands
118.8	J	Repeater test / special

UHF bands430 MHz – 5.85 GHz

Band / channel	Frequency	Notes
70 cm	430.000 – 440.000 MHz	Secondary user
70 cm SSB calling	432.200 MHz	USB
70 cm FM calling	433.500 MHz	U280, simplex
70 cm Emergency	433.450 MHz	IARU Region 1 emergency centre of activity
70 cm FM repeater inputs	430.800 – 431.975 MHz	RU66–RU114, +1.6 MHz shift
70 cm FM repeater outputs	433.000 – 433.375 / 438.400 – 439.975 MHz
70 cm APRS	432.500 MHz	UK DX cluster / APRS secondary
70 cm DMR / D-STAR	439.x MHz (repeater plan)	Digital voice repeater outputs
23 cm	1240 – 1325 MHz	Secondary; under GNSS pressure
23 cm FM calling	1297.500 MHz
23 cm SSB calling	1296.200 MHz
13 cm	2310 – 2450 MHz	Shares with ISM at 2400–2450
9 cm	3400 – 3475 MHz	Secondary
6 cm	5650 – 5850 MHz

Microwave & mmWave10 GHz – 250 GHz

Band	Frequency
3 cm	10.000 – 10.500 GHz
1.2 cm	24.000 – 24.250 GHz
6 mm	47.000 – 47.200 GHz
4 mm	75.500 – 81.500 GHz
2 mm	122.250 – 123.000 GHz
1 mm	241 – 250 GHz

Licensing: Foundation / Intermediate / Full classes set power limits (10 W / 50 W / 400 W typical on HF-VHF).

CBCitizens' Band (CB) — licence-exempt26.965 – 27.99125 MHz

UK / CEPT FM ("EU") band — 40 ch26.965 – 27.405 MHz

FM, 4 W max, 10 kHz spacing. This is the main band used today in the UK.

Ch	MHz	Ch	MHz	Ch	MHz	Ch	MHz
1	26.965	11	27.085	21	27.215	31	27.315
2	26.975	12	27.105	22	27.225	32	27.325
3	26.985	13	27.115	23	27.255	33	27.335
4	27.005	14	27.125	24	27.235	34	27.345
5	27.015	15	27.135	25	27.245	35	27.355
6	27.025	16	27.155	26	27.265	36	27.365
7	27.035	17	27.165	27	27.275	37	27.375
8	27.055	18	27.175	28	27.285	38	27.385
9	27.065	19	27.185	29	27.295	39	27.395
10	27.075	20	27.205	30	27.305	40	27.405

Channel	Convention
Ch 9	Emergency & road assistance (REACT monitoring)
Ch 14	General calling / 4x4 off-road
Ch 19	Truckers' calling / highway
Ch 27	UK 4x4 Response

UK FM ("legacy UK") band — 40 ch27.60125 – 27.99125 MHz

The original 1981 UK-only FM band. Still legal, still in use alongside the CEPT band. 4 W, FM.

Ch	MHz	Ch	MHz	Ch	MHz	Ch	MHz
1	27.60125	11	27.70125	21	27.80125	31	27.90125
2	27.61125	12	27.71125	22	27.81125	32	27.91125
3	27.62125	13	27.72125	23	27.82125	33	27.92125
4	27.63125	14	27.73125	24	27.83125	34	27.93125
5	27.64125	15	27.74125	25	27.84125	35	27.94125
6	27.65125	16	27.75125	26	27.85125	36	27.95125
7	27.66125	17	27.76125	27	27.86125	37	27.96125
8	27.67125	18	27.77125	28	27.87125	38	27.97125
9	27.68125	19	27.78125	29	27.88125	39	27.98125
10	27.69125	20	27.79125	30	27.89125	40	27.99125

Ch 9 is the traditional UK-band emergency / monitoring channel; Ch 14 is the UK-band calling channel.

BizUK Business Radio (Ofcom licensed)71 MHz – 470 MHz

Simple UK Light (shared, no site licence)86 / 164 / 449 MHz

Shared channels, 5 W max, 12.5 kHz FM or DMR Tier II. CTCSS/DCS strongly recommended to mute other users of the same channel.

Ch	Frequency	Band
1	86.3125 MHz	VHF Low
2	86.3250 MHz	VHF Low
3	86.3375 MHz	VHF Low
4	86.3500 MHz	VHF Low
5	86.3625 MHz	VHF Low
6	86.3750 MHz	VHF Low
7	164.0500 MHz	VHF Mid
8	164.0625 MHz	VHF Mid
9	164.0750 MHz	VHF Mid
10	164.0875 MHz	VHF Mid
11	164.1000 MHz	VHF Mid
12	164.1125 MHz	VHF Mid
13	164.1250 MHz	VHF Mid
14	164.1375 MHz	VHF Mid
15	164.1500 MHz	VHF Mid
16	449.4500 MHz	UHF
17	449.4625 MHz	UHF
18	449.4750 MHz	UHF

Simple UK (technically assigned)VHF / UHF

Blocks assigned by Ofcom from within the main business radio sub-bands below. Typical slots: 165.05, 168.95, 173.0625, 449.4875 MHz etc. Site-specific, low power.

VHF Low Band71.5 – 87.5 MHz

Legacy low-band PMR; still used for some utility / rural fleets. 12.5 kHz spacing. Paired and simplex channels across 71.5–72.8, 77.6125–87.5 MHz (split around Band II FM broadcast).

VHF Mid Band (PMR)136 – 174 MHz

Sub-range	Typical use
138.000 – 141.000 MHz	PMR mobile / base
141.000 – 143.975 MHz	Fixed links, paging
146.000 – 147.500 MHz	Non-coordinated PMR
147.500 – 148.500 MHz	Paging
148.500 – 156.000 MHz	PMR base/mobile
156.000 – 162.050 MHz	Maritime (see Marine section)
162.050 – 174.000 MHz	PMR base/mobile, on-site

UHF Business Band425 – 470 MHz

Sub-range	Typical use
425.00625 – 429.99375 MHz	PMR mobile / on-site (mobile half)
440.00625 – 444.99375 MHz	PMR base (paired with 425 MHz, +14.5 MHz split)
450.00625 – 452.99375 MHz	PMR mobile
458.50625 – 459.49375 MHz	Wide-area paging / on-site
459.50625 – 460.49375 MHz	On-site PMR
461.00625 – 464.99375 MHz	PMR base / trunked
464.80625 – 464.98125 MHz	On-site mobile (12.5 kHz)

Narrowband (12.5 kHz) FM, DMR Tier II/III, NXDN and dPMR all operate here under technically-assigned licences.

PMRPMR446 (licence-exempt)446.0 – 446.2 MHz

Analogue PMR446446.00625 – 446.09375 MHz

Ch	Frequency (MHz)	Convention
1	446.00625	General calling / hikers
2	446.01875
3	446.03125	Informal emergency / mountain rescue monitoring (no legal status)
4	446.04375
5	446.05625
6	446.06875
7	446.08125
8	446.09375	"Prepper" / long-range calling convention

FM, 12.5 kHz spacing, 500 mW ERP, integral antenna, simplex only. Licence-exempt across EU/UK. CTCSS/DCS is cosmetic — it does not give privacy, only mutes others sharing the same channel.

Common CTCSS tones (Hz) — also called "PL" / "privacy code 1–38":

1: 67.0	2: 71.9	3: 74.4	4: 77.0	5: 79.7	6: 82.5	7: 85.4	8: 88.5
9: 91.5	10: 94.8	11: 97.4	12: 100.0	13: 103.5	14: 107.2	15: 110.9	16: 114.8
17: 118.8	18: 123.0	19: 127.3	20: 131.8	21: 136.5	22: 141.3	23: 146.2	24: 151.4
25: 156.7	26: 162.2	27: 167.9	28: 173.8	29: 179.9	30: 186.2	31: 192.8	32: 203.5
33: 210.7	34: 218.1	35: 225.7	36: 233.6	37: 241.8	38: 250.3

DCS (Digital Coded Squelch) adds ~104 codes (023, 025, 026, 031, 032 … 754) sent as a sub-audible 134.4 bps data stream. Most PMR446 radios expose both.

Digital PMR446 (dPMR / DMR)446.103125 – 446.196875 MHz

Ch	Frequency (MHz)
1	446.103125
2	446.109375
3	446.115625
4	446.121875
5	446.128125
6	446.134375
7	446.140625
8	446.146875
9	446.153125
10	446.159375
11	446.165625
12	446.171875
13	446.178125
14	446.184375
15	446.190625
16	446.196875

6.25 kHz spacing, 500 mW ERP. Supports dPMR446 (FDMA) and DMR446 Tier I (TDMA — occupies two adjacent 6.25 kHz slots).

ISMISM & Short-Range Devices6.78 MHz – 122 GHz

HF ISM6.765 – 40.70 MHz

Band	Frequency	Notes
6.78 MHz	6.765 – 6.795 MHz	Inductive, RFID
13.56 MHz	13.553 – 13.567 MHz	NFC, HF RFID (contactless payment)
27 MHz	26.957 – 27.283 MHz	CB radio, R/C models
40 MHz	40.660 – 40.700 MHz	Telemetry, R/C

LPD / 433 MHz SRD433.05 – 434.79 MHz

Low-power devices, key fobs, weather sensors, garage doors, LPD69 voice channels. 10 mW ERP. Shared with 70 cm amateur (primary above 430 MHz).

863 – 870 MHz (SRD / LoRa / Sigfox)863 – 870 MHz

Sub-band	Use	Power / Duty
863 – 865 MHz	Wireless audio, SRDs	10 mW, 0.1% DC
865 – 868 MHz	RFID interrogators	2 W ERP
868 – 868.6 MHz	Generic SRD, LoRaWAN EU868	25 mW, 1% DC
868.7 – 869.2 MHz	SRD	25 mW, 0.1% DC
869.4 – 869.65 MHz	High-power SRD	500 mW, 10% DC
869.7 – 870 MHz	SRD	5 – 25 mW

2.4 GHz ISM2400 – 2483.5 MHz

Wi-Fi 2.4 GHz (802.11 b/g/n/ax), Bluetooth, Zigbee, microwave ovens, video senders. 100 mW EIRP typical.

5 GHz ISM / RLAN5150 – 5875 MHz

Sub-band	Use	Notes
5150 – 5350 MHz	Wi-Fi U-NII-1/2A	Indoor, DFS above 5250
5470 – 5725 MHz	Wi-Fi U-NII-2C	DFS/TPC required (radar coexistence)
5725 – 5875 MHz	ISM / BFWA	25 mW EIRP SRD; 4 W EIRP BFWA

Other ISM24 GHz – 122 GHz

Band	Use
24.00 – 24.25 GHz	Door openers, motion sensors, car radar (legacy)
57 – 71 GHz	WiGig / 802.11ad,ay, unlicensed backhaul
76 – 77 GHz	Automotive radar
122 – 123 GHz	High-resolution SRD radar

TETRATETRA / Airwave380 – 430 MHz

Airwave (Emergency Services Network)380 – 400 MHz

Segment	Use
380.0 – 385.0 MHz	ES mobile TX (uplink) — Police, Fire, Ambulance, Coastguard
390.0 – 395.0 MHz	ES base TX (downlink, paired –10 MHz)
385.0 – 390.0 MHz	Military / government TETRA (mobile TX)
395.0 – 400.0 MHz	Military / government TETRA (base TX)

TETRA carriers on a 25 kHz raster with 4-slot TDMA. Each talkgroup uses a logical slot, not a fixed frequency. Press-and-hold the orange button = TETRA Emergency Call — preempts the talkgroup, raises priority, opens the microphone. TEA2 encryption; content not recoverable without keys.

Service run by Motorola/Airwave Solutions; gradual replacement by ESN (Emergency Services Network) over EE 4G/5G with priority access on the 700 MHz band.

Commercial TETRA410 – 430 MHz

410–420 MHz mobile TX, 420–430 MHz base TX (10 MHz split). Used by utilities, airports, transport operators and private trunked networks. Also DMR Tier III trunking shares parts of this range under business radio licensing.

AviAviation2.85 MHz – 15.7 GHz

HF Aeronautical2.85 – 22 MHz

Band	Use
2.850 – 3.155 MHz	Oceanic / remote-area HF
3.400 – 3.500 MHz	HF air-ground (R)
4.650 – 4.750 MHz	HF air-ground
5.480 – 5.730 MHz	Shanwick / oceanic control
6.525 – 6.765 MHz	HF air-ground (R)
8.815 – 9.040 MHz	Oceanic, NAT, long-haul
10.005 – 10.100 MHz	HF air-ground
11.175 – 11.400 MHz	Military HF (GHFS / "Mainsail")
13.200 – 13.360 MHz	Air-ground
15.010 – 15.100 MHz	Military HF-GCS
17.900 – 18.030 MHz	Long-haul air-ground
21.924 – 22.000 MHz	Long-haul air-ground

VHF Airband (civil)108 – 137 MHz

Frequency	Use
108.000 – 111.975 MHz	ILS localiser (odd 100 kHz) / VOR (even 100 kHz)
112.000 – 117.975 MHz	VOR navaids
118.000 – 121.400 MHz	ATC tower / approach / area control (AM DSB)
121.500 MHz	International aeronautical distress — "Guard" (121.5)
121.600 – 121.925 MHz	Ground movement / apron / delivery
121.650 / 121.725 / 121.775 MHz	ATS autorouter fallback / emergency ops at some airfields
122.000 – 122.375 MHz	SAR scene-of-search (secondary)
122.475 MHz	UK GA flight safety / air-to-air
123.450 MHz	Air-to-air (Fingers, worldwide convention — unofficial)
123.100 MHz	SAR on-scene (Cospas-Sarsat coordination)
129.725 / 129.825 MHz	Common gliding / aerobatics
131.525 / 131.725 MHz	ACARS Europe (POA/Primary)
136.975 MHz	VDL Mode 2 common signalling (CSC)
136.000 – 136.975 MHz	Area / enroute / company / datalink

8.33 kHz channel spacing mandatory above FL195 and in most UK controlled airspace. AM DSB voice, 6 kHz deviation. Aircraft transponder "emergency squawks": 7500 hijack, 7600 radio failure, 7700 general emergency.

UHF Military Airband225 – 400 MHz

Frequency	Use
243.000 MHz	Military aeronautical distress — UHF Guard (exactly 2× 121.5)
282.800 MHz	Combined SAR / Kinloss-era RCC primary (Joint on-scene)
245.100 MHz	SAR secondary
252.800 MHz	London Military common
275.800 MHz	Scottish Military common
278.000 MHz	Swanwick Mil
355.400 MHz	Eastern Radar
369.925 / 369.975 MHz	Tanker / AAR common
Various	Tactical, AAR, ATC (RAF / USAFE)

UHF aero uses 25 kHz AM, 225.000 – 399.975 MHz. Older "A/A" pairs step in 25 kHz. All UK fast-jet activity monitors 243.000 MHz Guard.

Radars, Transponders & Datalinks960 MHz – 15.7 GHz

System	Frequency
DME	960 – 1215 MHz
SSR / Mode S interrogation	1030 MHz
SSR reply, ADS-B, ACAS/TCAS	1090 MHz
UAT (ADS-B, US)	978 MHz
GPS L1 / Galileo E1	1575.42 MHz
GPS L2	1227.60 MHz
GPS L5 / Galileo E5a	1176.45 MHz
Primary radar (L-band)	1215 – 1400 MHz
Primary radar (S-band)	2700 – 3100 MHz
Weather radar (airborne C)	5350 – 5470 MHz
Precision approach radar	9000 – 9200 MHz
Airborne weather (X)	9300 – 9500 MHz
Radio altimeter	4200 – 4400 MHz
406.025 – 406.1 MHz	ELT / EPIRB / PLB satellite beacons (Cospas-Sarsat)
121.500 / 243.000 MHz	ELT homing (post-satellite alert)

Transponder emergency squawks

7500	Unlawful interference (hijack)
7600	Radio/communication failure
7700	General emergency
7000	UK VFR conspicuity
2000	IFR entering UK from non-SSR area

MilUK Military1.6 MHz – 45 GHz

HF Tactical / Strategic1.6 – 30 MHz

DERA/MOD Stanag 4538 ALE nets, GHFS-linked gateways, STANAG 5066, Skynet ground-stations, embassy backup links. Numbers/utility traffic common between amateur sub-bands.

Notable: 4.742, 6.739, 8.992, 11.175, 13.200, 15.016 MHz — USAFE / HF-GCS frequencies audible from UK bases.

Low-band VHF Tactical (Bowman / Morpheus)30 – 88 MHz

Clansman → Bowman → (Morpheus replacement) combat net radio. FM / frequency hopping, 25 kHz. Extensively used on Salisbury Plain and other training estates.

VHF Air / Ground138 – 144, 146 – 156 MHz

Segments of the mid-VHF band are reserved for MOD fixed/mobile use, including ranges and training areas.

UHF 225 – 400 MHz225 – 400 MHz

Frequency	Use
225 – 328.6 MHz	Tactical AM/FM voice, SATCOM uplinks
243.000 MHz	UHF Military Guard — global distress
282.800 MHz	SAR on-scene joint
311.000 / 317.500 MHz	HAVEQUICK net calling (frequency-hopping UHF)
335.4 – 399.9 MHz	Air-ground, UHF AM voice, datalinks
240 – 270 / 290 – 320 MHz	UHF MILSATCOM (Skynet / Fleetsat heritage)

L/S/C/X/Ku-band1 – 15 GHz

System	Frequency
Link-16 / MIDS	960 – 1215 MHz (shared w/ DME)
Skynet X-band SATCOM	7.25 – 8.40 GHz
Skynet Ka/extended	20 – 21, 43 – 45 GHz
Airborne / naval radars	C, X, Ku

DipForeign Embassies & DiplomaticHF / VHF / UHF

HF diplomatic traffic3 – 30 MHz

Embassies in London historically maintain HF links to their capitals. Traffic is typically found in the utility (non-broadcast) portions between amateur and broadcast bands — CW, RTTY/Baudot, PSK, MFSK and PACTOR are all observed. Modes evolve from STANAG 4285 (NATO-aligned) through to proprietary MIL/diplomatic waveforms.

"Numbers stations" — one-way voice or data transmissions to intelligence officers — have long been associated with diplomatic activity. Examples heard from the UK:

Station	Approx. freq	Origin (believed)
E06 / S06 "English/Slavic lady"	4.6 / 5.4 / 7.3 / 9.2 MHz	Russian SVR
E07	5–10 MHz, schedule-based	Russian SVR
M12	5–14 MHz, CW	Russian
V02a / "Atención"	~6.855 / 9.040 MHz	Cuban DI
"Lincolnshire Poacher" (retired 2008)	~11.545 MHz	UK SIS (Akrotiri)
"Cherry Ripe" (retired 2009)	~13.530 MHz	UK SIS (Australia)

No dedicated ITU "embassy band" — allocations are taken from the fixed service. Ofcom coordinates London diplomatic licensing.

VHF / UHF embassy local comms138 – 470 MHz

Close-protection details, driver nets and compound security operate on Ofcom-assigned channels from the business radio bands, usually narrowband FM or DMR. Some embassies hold dedicated pairs in the 167–169 MHz and 453–461 MHz regions.

MarMaritime415 kHz – 162 MHz

MF / HF Marine & GMDSS415 kHz – 27.5 MHz

Frequency	Use
415 – 526.5 kHz	Maritime MF band
490 kHz	NAVTEX (local languages)
518 kHz	NAVTEX international (English)
2182 kHz	MF voice distress & calling (historic GMDSS)
2187.5 kHz	MF DSC distress
4207.5 / 6312 / 8414.5 / 12577 / 16804.5 kHz	HF DSC distress (GMDSS)
4125 / 6215 / 8291 / 12290 / 16420 kHz	HF SSB distress & safety
406.025 – 406.1 MHz	EPIRB / PLB satellite beacons (Cospas-Sarsat)

Marine VHF channels156.000 – 162.025 MHz

25 kHz FM. Duplex channels use a 4.6 MHz base↑ / shore↓ split. "M" channels are UK-only.

Ch	Ship TX / RX (MHz)	Use
01	156.050 / 160.650	Port ops / public corresp.
06	156.300	Inter-ship (SAR secondary)
08	156.400	Inter-ship
09	156.450	Port ops / pilot
10	156.500	Inter-ship, SAR, pollution
12	156.600	Port operations
13	156.650	Bridge-to-bridge navigation safety
14	156.700	Port operations
15	156.750	On-board & SAR scene
16	156.800	International distress, safety & calling
17	156.850	On-board, 1 W
23	157.150 / 161.750	HM Coastguard MSI broadcasts
27	157.350 / 161.950	Public correspondence
28	157.400 / 162.000	Public correspondence
67	156.375	HM Coastguard small-craft safety (dual-watch with 16)
68	156.425	Marina / port ops
69	156.475	Inter-ship, marinas
70	156.525	DSC distress / safety / calling — voice prohibited
71	156.575	Marina ops, port ops
72	156.625	Inter-ship only
73	156.675	Inter-ship, SAR, MSI
74	156.725	Port operations
75 / 76	156.775 / 156.825	Guard bands for Ch 16 — restricted, 1 W
77	156.875	Inter-ship (leisure)
M1 (37)	157.850	UK marina (private)
M2	161.425	UK yacht clubs & racing
AIS 1	161.975	AIS — Automatic Identification System
AIS 2	162.025	AIS
ASM 1 / 2	161.950 / 162.000	VDES Application Specific Messages

UK GMDSS area A1: continuous Ch 70 DSC watch + Ch 16 voice watch maintained by HM Coastguard (MRCC). "Mayday" on Ch 16, DSC alert on Ch 70 (press the red button).

BCBroadcast148.5 kHz – 790 MHz

LF / MF / SW148.5 kHz – 26.1 MHz

Band	Range	Notes
LW	148.5 – 283.5 kHz	BBC R4 on 198 kHz (Droitwich; end-of-life)
MW	526.5 – 1606.5 kHz	AM broadcast; many UK outlets closed
SW	2.3 – 26.1 MHz	International broadcasting (BBC WS via relays, etc.)

VHF FM (Band II)87.5 – 108 MHz

BBC and commercial FM — national, regional, local and community licences. 100 kHz raster, WFM ±75 kHz, RDS subcarrier at 57 kHz.

DAB / DAB+ (Band III)174 – 240 MHz

UK multiplexes use blocks 11A – 12D primarily. Mode I, 1.536 MHz wide, T-DMB/ETSI EN 300 401.

DTT (UHF Bands IV/V)470 – 694 MHz

Freeview DVB-T / DVB-T2, 8 MHz channels 21–48. 694–790 MHz returned to mobile (700 MHz 4G/5G) in 2020.