Three Royal Navy warships are in London to commemorate the 70th anniversary of the Battle of the Atlantic. HMS Edinburgh, the last of the fleet’s Type 42 destroyers, is on her first stop on a round-Britain farewell tour which ends nearly 30 years of service. She is joined in the capital this week by the giant helicopter carrier HMS Illustrious, and Sandown-class minehunter HMS Blyth for 6 days of events commemorating the longest military campaign of the Second World War, the Battle of the Atlantic.