Ms Brocklebank said: “Crossrail has always been seen as bringing a huge boost to Bond Street and West End retail and we need it more than ever if central London is to bounce back from the pandemic.”
The Government has said it remains committed to the project.
Mark Wild, Crossrail chief executive, told the Daily Telegrpah he was “very confident” that a revised opening “window” of between January and June 2022 would be achieved.
However, it is understood that this is reliant on the extra funding from Government being agreed.
A TfL spokesperson said: “TfL, the GLA and Government all continue to have discussions around the additional funding needed to complete the Crossrail project.”