By Political Editor For The Daily Mail
Published: 22:11 GMT, 1 January 2020 | Updated: 22:11 GMT, 1 January 2020
Boris Johnson has ordered a major probe into the leaking of confidential Government documents to Labour during the election campaign.
Government sources said the Prime Minister is concerned that a ‘Labour mole’ could be operating at a high level within Whitehall.
Mr Johnson faced embarrassment when a confidential Treasury document that appeared to contradict some of his claims on Brexit was leaked to Jeremy Corbyn a week before polling day.
Boris Johnson (pictured) has ordered a major probe into the leaking of confidential Government documents to Labour during the general election campaign
The document – understood to have