Hello. I have been qualified and in receipt of PfCO for about a year and have been flying the easy jobs until now. I have just had a request to fly within a built up area. Can you guys advise how best to deal with this from a UK CAA point of view? I cannot maintain 50 metres of separation from buildings and persons from the operating area. Do I need to establish a cordon and notify the neighbouring properties in order to undertake this flight? I would be flying a DJI Phantom 3 (therefore sub 7kg). Any advice would be gratefully received!