TOWTEAMBASE, you're welcome to point out each and every security breach in this thread.
As long as you concentrate on taking pictures of aircraft in the air and avoid taking pictures of the buildings inside the restricked area you're home free. I will also recommend having the Anti-Terrorist hotline number 0800 789 321 on your mobile speed dial, and use the number if you ever should see any suspicious activity. There are a number conscious aviation enthusiasts, but there are also a pile unconscious ones. At some of the UK airports the local police has indicated that they need your help, here is an example from Robin Hood Airport Doncaster Sheffield (DSA).