The Queen made a surprise appearance in London on Tuesday as she opened the new Elizabeth line. The 96-year-old has avoided the public eye recently after struggling with mobility issues, but appeared in good spirits as she visited Paddington station. The Crossrail project to build the east-west railway was meant to be finished in 2018, but was delayed by numerous problems including construction issues and complications installing signalling systems. It is finally due to open to the public on 24 May
