It's alleged a Conservative minister in the 1960s, who was also a Devon MP, sold information about his colleagues and Parliament to communist spies.
Czech Security Service files are reported to reveal Raymond Mawby, who died in 1990, was in its pay for a decade.
Today in Parliament, the current MP for Totnes, Sarah Wollaston, called for a full inquiry.
More top news
A hospital in South Devon was put on major alert this evening. Police were called to the site in response to "a threat".
Prince Charles was left red-faced when he struggled to unveil a plaque at Truro Cathedral School.
Nick Bailey was poisoned by the Novichok nerve agent while working on the investigation into the attack on the Skripals.