Former Metropolitan Police sergeant Graham Wettone has told Daybreak that the Margaret Thatcher death 'party' due to take place on Saturday has been "planned for years".
Mr Wettone, who has dealt with many significant public disorders, said he was "hopeful that tomorrow will be a peaceful event in the capital."
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.