Hi Jan,
The UK CAA are only interested in aerodromes that are licenced by them. There used to be many more licenced aerodromes in the UK when it was a requirement for flying training for an ICAO-compliant licence to be conducted at such. When that regulation was removed about 10 years ago, a lot of smaller aerodromes in the UK chose to hand in their licences. Incidentally, there has never been a requirement for an aerodrome to be licenced for the conduct of training for a sub-ICAO licence, such as for flying microlights. Civil Aviation Publication 793 gives advice on some dimensions of aerodromes to be used for flying training and it is now the responsibility of the instructor to ensure the suitability of an aerodrome, rather than the regulator. Of course, apart for flying training, it is the responsibility of the pilot to ensure the suitability of a site to be used for the alighting or departure of the aircraft they are flying.
TOO