Someone seems to have filled the fountains in Trafalgar Square and the one in front of Buckingham Palace with blue paint!
Also, I got a graphic glitch in the Thames estury - it was 'beach' all the way across:
Edit: Same the other side of the Channel:
I tried landing on it, but it is definitely water (or quicksand!)
I've also had it crash twice while in the Tiger Moth - looking down in the cockpit seemed to cause it.