Socialist Worker has previously reported that disgraced MP Peter Hain took over £15,000 from the GMB union and then decided to slash jobs for disabled workers at the Remploy factories, many of them represented by the GMB.
But it is not entirely clear where the money went.
Paul Kenny, the general secretary of the GMB, is to be interviewed as part of the police inquiry into whether the former cabinet minister broke the law by not declaring donations of more than £100,000 to the Electoral Commission.
Kenny said, “We will cooperate fully with the police inquiries and will supply any documentation that the police require on the donation.
“We want the police to inquire into whether our money was spent correctly.
“We can trace £4,197 as it was a printing bill, [but] the £10,000 was supposed to be spent on an advertising campaign.
“We want the police to make sure it was, and not channelled to any other third party. If it wasn’t spent on advertising we want our money back.”