Battersea has embraced a “fly neighbourly” mantra for many decades. Pilots are not even allowed to use the heliport unless they have had an individual ATC briefing on the place, which has to be signed for on completion.
Unfortunately, ongoing planning applications have seemingly never taken into account objection inputs from the heliport owners and permissions for an increasing number high rise buildings have been allowed immediately adjacent to the only possible flight paths (which are both over the river Thames for those not familiar). Paradoxically, these buildings must reflect and concentrate helicopter noise, exacerbating the problem.
It’s worth re-emphasising the fact that Battersea Heliport is the only licensed landing site anywhere near the centre of London.