Andy Byford (centre), Commissioner for Transport for London and Mark Wild (left) CEO of Crossrail speak to the press in the ticket hall of the Elizabeth Line at Paddington Station.

The entrance to the Elizabeth Line at Liverpool Street Station.

The entrance to the Elizabeth Line at Liverpool Street Station.

The entrance to the Elizabeth Line at Liverpool Street Station.

The entrance to the Elizabeth Line at Liverpool Street Station.

A worker cleans the hand rails on the escalators at the Elizabeth Line's Liverpool Street Station.

Platform level at the Elizabeth Line's Liverpool Street station.

Platform level at the Elizabeth Line's Liverpool Street station.

Platform level at the Elizabeth Line's Liverpool Street station.

A train operator in his cabin as an Elizabeth Line train nears a station.

A cleaner at work on the Elizabeth Line platform at Farringdon station.

A train operator in the cabin of an Elizabeth Line train.

A train moves through an Elizabeth Line tunnel between stations.

The Elizabeth Line platform at Paddington.

Escalators are cleaned at the entrance to the Elizabeth Line station at Paddington.