London could halve the cost of major new transport projects by adopting a European model of planning and financing, a City Hall report has said. Infrastructure projects in London are often more expensive than in other European cities, with the Jubilee line extension costing 10 times as much per mile compared to a similar project in Madrid. The report, entitled Mind the Funding Gap, called on the mayor and TfL to restart work on Crossrail 2, which was paused after the government stopped funding during the Covid-19 pandemic.