DOCUMENTARY THE STASI: SECRETS, LIES & BRITISH SPIES

With the end of the Cold War, the archive of the Stasi – East Germany’s secret police – began to reveal its secrets decades ago. But, as Julie Etchingham reveals in this investigation, the identities of some of its agents and informants in Britain remain undisclosed even now – raising disturbing questions for the highest authorities. ITV1, 10.15pm