Ghosts haunt the Square Mile and a digital punk comes to Glasgow – the week in art

A work by Wendell Gladstone on display at the Phantasmata exhibition Photograph: Courtesy of the artist; Public Gallery, London and Shulamit Nazarian, LA

Exhibition of the week

Radio Ballads
Sonia Boyce, Helen Cammock, Ilona Sagar and Rory Pilgrim collaborate with people from Barking and Dagenham to create socially engaged artworks.
• Serpentine Gallery, London, from 31 March.