Tunnel visions: arts and tourism transform underground spaces

From music and dance to herb farms, Britain’s subterranean spaces are being put to new, creative usesIn the subterranean engine room of the world’s first river tunnel – the Brunel, which runs under the Thames between Rotherhithe and Wapping – Liane Carroll, Sophie Bancroft and Sara Colman are singing swing jazz for an audience seated on fold-up chairs.The notes bounce off brick walls blackened with soot from a century of steam trains. It is a strange new life for a room t