Jonathan Freedland takes the Long View of suspected state espionage through technology companies.

He compares investigations into spy activity in Britain by Siemens employees for Nazi Germany in the run up to World War II and the allegations about Huawei’s 5G equipment containing 'back doors' that could be used by Chinese state intelligence.

Following the historical story from the National Portrait Gallery Archive, to the former tech corridor of the Great West Road and ending at the Churchill War Rooms Jonathan is joined by historian Rob Hutton, Chris Cook editor at Tortoise Media , Elisabeth Braw of the Royal United Services Institute, Chair of UK5G Ros Singleton and actor Greg Jones.

Producer Neil McCarthy