From Boris’s Brexit Bridge to a double decker M25: the unlikely mega projects that might keep Britain moving

Could our transport of the future really include sky-high cycle lanes, 700 mph pods and a motorway through the Pennines? Well, says Colin Drury, maybe

Skycycle could transform the way Londoners commute across the city (Foster and Partners)

From an airport on the Thames to Brexit Bridge, Boris Johnson has never been shy of supporting improbable infrastructure projects

Last weekend the former foreign secretary caused a stir when he renewed calls for a road crossing between Northern Ireland and Scotland.

The link – which would be a probable 30 miles long, in a sea three times as deep as the English Channel (assuming he had in mind a crossing between Larne and Portpatrick) – would be a fitting legacy of the UK’s decision to leave the EU, he reckons.