Three former ministers have been suspended from the Parliamentary Labour Party "for bringing it into disrepute".
Stephen Byers, Patricia Hewitt and Geoff Hoon are under investigation over their apparent willingness to help a lobbying firm in return for cash.
They were all secretly filmed by the Sunday Times and Channel 4's Dispatches.
The Conservative leader, David Cameron, said the prime minister should rethink his decision not to hold a government inquiry.
Ben Wright reports.
Bookmark with:
What are these?
E-mail this to a friend