LONDON, ENGLAND – APRIL 10:  A hearse carrying the coffin of PC Keith Palmer makes its way down Southwark Street past lines of police officers after his funeral at Southwark Cathedral. A Full Force funeral is held for PC Keith Palmer who was killed in an attack at Westminster whilst on duty on March 22, 2017. The funeral is attended by his family, including his wife and child, and officers from the Metropolitan Police who served alongside him. Officers from the wider service across England and Wales also attend to honour their fallen colleague.  (Photo by Chris J Ratcliffe/Getty Images)