Filton is a secure airport, I don't see how it could get anymore secure unless you have a platoon of gaurds pacing the perimeter and grounds 24x7
It is strict PPR and a designated airfield. it really is a good airfield and Flight Op's are a great crew.
As for the raft it was a 4 man raft in a compact case. It can easily be carried by a one armed Bandit
