Information for NQY - Cornwall Airport Newquay, EGHQ, also known as Ayrborth Tewynblustri Kernow or indeed RAF St. Mawgan
B2B is like the IOM but even smaller, you need to fully exit to landside and the return back via security. Which has always been swift there, the team there are keen to get you through swiftly. They don't have full liquid testing there (they use the old test-tube mixer process) so if you have valuable cosmetics it's best not to bring them, that process sometimes gives false or ambiguous results. The main departure area is fairly small with limited facilities so there is zero risk of missing your flight as far as I can see, on a B2B you may well end up in front of some of the locals who know not turn up too early if HBO. Distances are short.
There is a small lounge for which you need a PIN door code from the information desk landside - the Executive Lounge is quite small, probably space for about 16 people cheek by jowl. I don't know if BA will have access to it (my guess is that they will) but Priority Pass works there. Children under 12 banned!