Originally due to open in December 2018, the railway is now severely over budget and its delayed opening is having a significant negative impact on Transport for London’s already under pressure finances due to the loss of fares and commercial income.
Tube passengers will now get more accurate information about interchanges and wait times after Transport for London used WiFi data to boost accuracy of its online Journey Planner tool.
Brown, who became Transport Commissioner in July 2015 after previously serving as London Underground Manager and Chief Operating Officer, will step down at the end of the current Mayoral term in May.
If it goes ahead, TfL says the extension would support the capital’s growing population by helping to deliver more than 5,000 new jobs and at least 25,000 new homes.
The prospect of a Boxing Day service was first raised in 2016 when a new contract between TfL and Overground operators Arriva made provision for trains to run on the bank holiday, and earlier this year Mayor Sadiq Khan said talks were underway to make it happen.