N/W is unlicensed so there are no training schools there.
Its also a complete sod to get into as you end up driving in a spiral, up the M11 and then right round the lanes and peri track.
All airfields are stuck in the middle of nowhere - I don't believe there is a single one that is easily accessible by public transport. There is a large one to the west of London that doesn't even have a main-line railway connection!