Found this online:
[ CAA finally agrees to adopt ICAO international standard on minimum flying height over population centres
After years of requiring a minimum flying height over conurbations that exceeded the International Civil Aviation Organisation (ICAO) requirement, the UK Civil Aviation Authority has adopted the 1,000ft (300m) international standard.
The CAA points out, however, that the requirement to be able to glide to alight without harming persons or property remains in place. ]
Guess they could always say they were getting up to height or coming down from height if someone complained.