This seems to be appropriate...
http://news.bbc.co.uk/1/hi/wales/north_west/4273095.stm
"TV disrupted by new police mast
Tetra masts have proved controversial across the UK
Residents have called for compensation because their TV reception has been distorted by a new police radio mast at Holyhead on Anglesey.
Up to 200 people saw their TV pictures become fuzzy and blurred when the Tetra mast on top of the local police station was turned on in December.
The company which put up the mast, 02 Airwave, said it was completely legal.
The problem can be solved by a special filter or by switching to satellite or digital TV services.
Residents said that both of these solutions were unpopular because of the cost.
One local woman said she had been surprised by the problem.
"I feel they should have been more considerate and warned us," she said.
"The interference can almost always be resolved by the fitting of an appropriate filter" - Ofcom statement
"We just didn't expect it - I had no idea a mast could call all this problem."
Holyhead's mayor, independent councillor Jeff Evans, said he thought it was unfair that people had been inconvenienced.
"I consider it that morally wrong in that, through no choice of their own, no involvement of theirs, the public are now being denied access to previously excellent reception in that area," he said.
02 Airwave, which put up the mast, has said it was completely legal.
"The Airwave service mast installed on Holyhead police station is fully compliant with the operations under the Wireless Telegraphy Act and this has been confirmed by Ofcom to local people," a spokesman said.
No obligation
An spokesperson for the watchdog body Ofcom said the problem had probably occurred because viewers have had amplifiers fitted to their television installations in order to boost the signal.
"The interference can almost always be resolved by the fitting of an appropriate filter," added the spokesperson.
"[02] Airwave is transmitting in accordance with its licence and is under no obligation to fund the remedy."
The spokesperson also pointed out that no-one had a legal right to good television reception.
Tetra (Terrestrial Trunked Radio) is a digital mobile radio system which has been chosen by the Home Office for a new communications system for emergency services, including the police.
The system has proved controversial across the UK because of health concerns."