MUST DO: free city hikes, free art – and five days of song

ART: A responsive light sculpture

An interactive work, Almost Everybody, by German sculptor Tobias Rehberger, has just been unveiled in the public atrium of Gasholders London, the development facing the canal. Consisting of 41 suspended glass lamps, it cleverly responds to the movement of people to the building, illuminating in different sequences according to the arrival and departure of each person. Like that? Check out nearby No.700 Reflectors, a 50 metre-long work on Cubitt Square by artist Rana Begum.

WALKS: City hikes for nada

Taking place across Bloomsbury, Holborn and Clerkenwell, a programme of free urban walks – with no need to book – feels like an upbeat way to start the year. We like the sound of Hanging Acre, which explores the gruesome history of the area bordered by Gray’s Inn Road, Clerkenwell Road and Leather Lane, visiting locations connected to murderers, executioners and the site of the ‘Thieves Kitchen’ and ‘Hanging Acre.’ Wed 24th and Fri 26th Jan at 1pm, meet at Chancery Lane Station. More info @midtownLDN

MUSIC: An A Cappella Festival 2018

Five days of song come to waterside arts space King’s Place this week, with international headliners and vocal supergroups alike hoping to show off “the incredible power of the human voice”. So expect jazz superstars New York Voices, all-female powerhouse Musae, world beatbox champions The Beatbox Collective, throat singers Huun-Huur-Tu, award-winning sextet Estonian Voices, and festival co-hosts The Swingles. There are also talks, pop-ups and workshops. 24th-28th Jan, King’s Place, 90 York Way, N1C. Tickets here.