Instead of my annual US trip, I've just been to some of the UK airports and had no hassle anywhere including since the bombing started.
Hadn't been to NCL for a while, since the new viewing area opened. No problems in 2 days. Didn't even see a cop. On the second day a Jet Provost landed. I decided to take a recce and try to view it round the hangars. I took the train to Callerton Parkway and walked up the access road past the "no unauthorised etc" sign - there was a security van but he ignored me. Made it to the flying club, asked more in hope and was given a full hangar tour (airside) plus tour of JP from the pilot.
LBA - viewing area by underpass still open. However they have tightened up round Multiflights, and security van was (politely) turning all undesirables away. Masses of fences, gates etc springing up. All you miss is the numbers in the hangars.
MME - spent a day at various access points including by Catering company which is sometimes iffy. No probs.
RAF Linton-on-Ouse - ridiculous! Still a low wooden fence the only 'security'. Viewing area open. No-one hassling or challenging you. Live and let live. Busier than usual, non-stop training activity including after dark. Only saw Tucanos.
LCY - impressed. Very busy with commuter traffic. Plenty of cops in evidence but no hassle, not even asked for ID. I was surprised just how active this is nowadays - Crossair, VLM, Sabena, Euroswiss, British Euro, EI Commuter, Scot, LH, Augsburg, Regional A/L, I logged over 40 in total. At 5 p.m. the place was shut down with a bomb scare in the car park even then the cops didn't go berserk. It's a bit spooky though with Canary Wharf towers dominating the landscape.