The Conservatives have received significant recent cash injections from a number of Russian donors and their associates, an investigation has uncovered.
The Information Commissioner has ruled that the UK government must name the MPs that belong to the European Research Group, which favours a hard Brexit and is led by Jacob-Rees Mogg MP.
A charity set up by Brexit backer, Arron Banks, has been strongly criticised by the Charity Commission.
The Eurosceptic Conservative MP Steve Baker has been a director and a trustee of the right-wing Cobden Centre since founding it in 2010 but chose not to declare this in the MPs' register of interests.
Concerns have been raised over the charitable status of a free market think tank that has close links to leading Brexit ministers.
A charity run by prominent Brexit donor Arron Banks has been under investigation by the Charity Commission.