The National Gallery is digging a tunnel next to Trafalgar Square

London is about to get a new tunnel, albeit a short one, as theNational Gallery plans to link two buildings via an underground tunnel so the public can walk between them.
Schematic showing new works in white (c) National Gallery / Planning application
It’s part of the NG200 redevelopment of the National Gallery’s Sainsbury Wing, which identified a number of problems with the current layout. At the moment, people generally go in via the ground floor, up the stairs/lift and then connec