John Mills, the founder and director of the homeshopping channel group, was at one time Labour’s largest donor.
“We found that JML Media Limited failed to disclose to Ofcom the political associations of one of its directors and major shareholders. This meant that the Licensee rendered itself disqualified from holding its broadcasting licence, under restrictions in the Broadcasting Act,” the regulator said in a statement.
The fine, which takes into account the action taken by JML to rectify the breach and its full cooperation with Ofcom, goes to HM Paymaster General.
In July Mills resigned from positions at Labour Leave, Labour Future, The Pound Campaign, Business for Brexit, and Labour for Britain.