London mayor Boris Johnson has said he will look for a seat to run for Parliament in 2015 "in all probability".
ITV News Deputy Political Editor Chris Ship is following developments.
NEW: Boris says "in all probability I will try to find somewhere to stand in 2015"
More top news
The Duke and Duchess of Cambridge arrived at the London Palladium Theatre an hour after scheduled.
A member of circus staff reportedly "neutralised" the big cat.
Warning in force for ice across many northwestern areas.