The 100th anniversary of the IEE. The EMS synthesiser, despite its huge size, looks dwarfed as it stands on the left of the stage at the Royal Festival Hall. Brian Hodgson wrote in 2017: "...the machine used at the Festival Hall was actually Peter Zinoviev’s own machine. The 'Delaware' was still in the process of being installed." Picture courtesy of Paddy Kingsland. © John Lightfoot.