Fremont Point
England · TV and FM
Position 49.251824, -2.126432 Grid reference XD90802800 Nation England Ground height 106 m Antenna height 139 m Aerial group Group B — C35–53, the middle Polarisation Horizontal BBC region South West/Channel ITV region Channel ITV news region Channel Ofcom site number 12800 The position is our conversion of Ofcom's grid reference XD90802800 from OSGB36 to WGS84 [V] . Ofcom publish no latitude and longitude for television sites. The transform is verified rather than assumed: on the 3,403 radio records that carry both, it reproduces Ofcom's own coordinates to within 0.1 m. OpenStreetMap has a mast 2 m away, matched on a name match [V] . That is an independent check on the position, not a correction to it — see how positions were checked . This page treats Fremont Point and Fremont Point as one mast. Ofcom's television and radio files share no site identifier, and the link here is inferred [I] from the name and position rather than confirmed. If they are in fact two structures a few hundred metres apart, the transmitter lists below are still each correct; only their being on one page is not.
On the map
Fremont Point is not the strongest signal anywhere the model predicts — it is shown here in place. That is normal for a relay, which fills in inside a main station's area.
Television This site carries the three public-service multiplexes and none of the three commercial ones, which is the normal arrangement at a relay — 1,059 of 1,169 sites are like this. Channels on SDN, ARQ A and ARQ B are simply not transmitted here, and no aerial will recover them; they need a main station. PSB3 (BBC B) is the UK's only DVB-T2 multiplex and carries every HD channel. Losing the HD channels while keeping the rest is therefore a single-multiplex fault rather than an aerial problem.
FM radio Services with no horizontal ERP radiate vertically only. A rooftop FM aerial is normally horizontal, so those will read weaker on a fixed installation than a car radio suggests — 803 FM services nationally are vertical-only. “Pattern” marks services with a published radiation pattern in that plane: 36 attenuation figures at 10° intervals clockwise from true north. Where one exists it is used in the coverage prediction, so those figures are directional rather than a circle. The television data publishes no equivalent.
Ofcom's notes SFN with Alderney.
Transmitter data is Ofcom's; every dataset and the terms it is used under are listed under sources . Coverage figures are modelled, not measured, and are systematically optimistic .