London 1

DAB ensemble · block 12C · 17 transmitters

Ensemble identifier: C185
Block: 12C
Frequency: 227.360 MHz
Licence: DL000003
Area: London
Services: 18 radio, 1 data

On the map

Where London 1 is radiated from — 17 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

What it carries

Capital LondonGrt Hits LondonHeart LondonSmooth RadioAbsolute 10sGoldKISS LondonMagic Radio LdnHits Radio LondonSmooth CountryHITS RADIO PRIDEClassic FM MoviesAbsolute RadioHeat RadioKISS XtraKiss DanceAbsolute 00sAbsolute Country

Data services

Logos

Transmitters

17 transmitters, strongest first. TII is the transmitter identifier a receiver can report, which is how you tell which one you are actually hearing in a single-frequency network.
Transmitter	Nation	Block	Frequency	ERP	Height	Area	TII
Croydon	England	12C	227.360 MHz	5.0 kW	128 m	London	0B/06
Wrotham	England	12C	227.360 MHz	4.5 kW	150 m	North West Kent	08/0F
Reigate	England	12C	227.360 MHz	1.2 kW	51 m	London	0B/05
Bluebell Hill	England	12C	227.360 MHz	1.0 kW	41 m	London	0B/15
Guildford	England	12C	227.360 MHz	977 W	39 m	London	0B/03
BT Tower	England	12C	227.360 MHz	800 W	192 m	Central London	08/17
Alexandra Palace	England	12C	227.360 MHz	794 W	100 m	North London	0B/02
Zouches Farm	England	12C	227.360 MHz	489 W	62 m	London	03/13
Hemel Hempstead	England	12C	227.360 MHz	391 W	69 m	London	0B/07
Caterham Old Park Wood	England	12C	227.360 MHz	140 W	48 m	Caterham	08/0D
Hungry Hill	England	12C	227.360 MHz	80 W	50 m	Farnham	03/04
Maidenhead Hyde Farm	England	12C	227.360 MHz	79 W	31 m	Maidenhead	08/05
Pin Green	England	12C	227.360 MHz	60 W	28 m	Pin Green	0B/0C
High Wycombe	England	12C	227.360 MHz	10 W	53 m	High Wycombe	16/10
Leatherhead Stoke dAbernon	England	12C	227.360 MHz	10 W	51 m	Leatherhead	08/12
Kenley	England	12C	227.360 MHz	8 W	38 m	Kenley	0B/14
Dartford Tunnel	England	12C	227.360 MHz	0 W	0 m	Dartford Tunnel

Radiation pattern

Its strongest transmitter with a published pattern, Croydon. Other transmitters of this ensemble may shape their signal differently.

Radiates most strongly toward the north (20°), as published by Ofcom.

More detail

Each ring is 10 dB of attenuation below the pattern's own peak; the outer rim is the peak itself and anything 30 dB down or deeper is drawn at the centre rather than off the edge of the chart, so a very deep null reads as “weak” and not as a hole in the picture. The shape says which direction radiates harder relative to the mast's own peak, not the absolute field strength there or how far it reaches — that is what the coverage map and the postcode lookup are for.