Last updated at 05:41

Elizabeth Line: Nine facts about the new London line

As London's newest line opens on Tuesday 24 May here are 9 fascinating facts about the Elizabeth Line.
The Elizabeth Line is 73-miles (118km) long. It runs from Essex in the east to Berkshire in the west, cutting underground through central London.
A carriage on the Elizabeth lineEPA
Throughout most of its construction it was known as Crossrail but was renamed Elizabeth Line in 2016 after Queen Elizabeth II. The line was nearly named the Churchill Line, after the wartime Prime Minister Winston Churchill, but Prime Minister Boris Johnson preferred it to be named after the Queen.
Queen Elizabeth II in 2016EPA
Although the Elizabeth Line is now on London's famous tube map, Transport for London (TFL) says it isn't a Tube line because it uses the National rail network and because its trains are much bigger.
Tube mapTfL
During work on the line, a team of archaeologists excavated around 3,000 human skeletons from a burial site at Liverpool Street in 2015. The people buried at Bedlam burial ground from 1569 to at least 1738 would have included victims of the plague.
Remains of a skeleton found at Crossrail siteGetty Images
Queen Elizabeth unveiled a plaque to officially open the line named after her on 17 May just weeks before her Platinum Jubilee celebrations.
Queen Elizabeth unveiling plaqueGetty Images
Construction on the Elizabeth Line - then called Crossrail - began in 2009. As well as new tunnels, old tunnels were reused like the 550-metre Connaught tunnel - a disused rail tunnel in Docklands that was built in 1878 - which was strengthened and widened for the Elizabeth Line.
Crossrail Connaught tunnelGetty Images
Disability campaigners lobbied hard for all 41 stations on the line to have step-free access. Now all Elizabeth Line stations will be accessible (Ilford is due to be made accessible by the summer) with some degree of step-free access to platform, whether with boarding or with a ramp.
Accessibility logoGetty Images
The Elizabeth Line has purple branding. Although this is a colour associated with the Royal family, TFL say this a coincidence and the colour was chosen because it was distinctive from London Underground red and London Overground orange making it easily identifiable for passengers.
Elizabeth line signGetty Images
There's a new depot at Old Oak Common which houses and maintains 42 of the Elizabeth Line’s 70 new trains at a time. The building incorporates heating and cooling from ground sources, with solar panels and rainwater harvesting to wash trains. An automatic system scans trains as they enter, reducing the overall time needed for maintenance.
Old Oak CommonTFL