Thousands of police officers line the streets to pay tribute to PC Keith Palmer

Thousands of police officers were today lining the streets of central London to pay tribute to PC Keith Palmer.

Officers from across Britain formed an honour guard along the route of the murdered PC's funeral procession.

Metropolitan Police officers were flanked by colleagues from other forces as they stood facing the pavements.

Rail firms offered free tickets to police travelling to the funeral.

PC Palmer was stabbed to death by Khalid Masood at the Houses of Parliament on March 22nd.