A company linked to the husband of Scottish businesswoman Michelle Mone ploughed tens of thousands of pounds into the Conservatives.
The cash - at least £171,480 - was pumped into the party before Doug Barrowman and Baroness Mone are alleged to have benefited from a lucrative PPE deal during the coronavirus pandemic.
The payments were made through UK-registered firm Lancaster Knox LLP, which is part of the 57-year-old businessman's Knox Group, based on the Isle of Man.
