Police describe the suspect they're looking for as:
- White, aged between 22-26 years
- Approximately 5ft 11ins
- Slim build and with short dark hair and a brown moustache
- Wearing grey tracksuit trousers and tracksuit top with a white motif on the front of the top
- Riding a purple mountain bike with black handle bars
More top news
The Mayor of London is one of several familiar faces popping up when the show returns to screens for its fifth series in November.
Here is a timeline of some of the key events in the debate over expansion of airport capacity.
More than 700 households were today bracing themselves for a government decision which could see their homes bulldozed.