According the the Serjeant at Arms crime is becoming an issue on the Parliamentary estate. Writing to MPs and staffers she claims parliament can:

“provide rich pickings for opportunistic individuals who will take advantage of any lax office procedures.”

Who’da thunk it?

She even helpfully includes a poster to display around the offices:

“And in the mean time, if in doubt LOCK IT AWAY.”

Seems to be doing the trick with crooked Labour MPs.