Under an idiotic new law, photographers in the UK can be stopped and their cameras, memory cards and film seized:
“If officers reasonably suspect that photographs are being taken as part of hostile terrorist reconnaissance, a search under section 43 of the Terrorism Act 2000 or an arrest should be considered.” More here.
Photographers Rights UK.
This seems to be part of a continuing fear the police there have of photographers. Here’s a poster from last year asking the public to look out for suspicious looking snappers: