Campaigners fighting to abolish the insurance premium tax (IPT) fear the Chancellor of the Exchequer may impose heavier burdens on insurers as he looks for a sop to the farming and haulage lobby.

The group, called the NCAIPT, is stepping up its campaign to persuade Gordon Brown to steer clear of further IPT hikes.

“We have been lobbying MPs of all parties for months on this topic – and not without success,” said director Philip Allott.

“We have had support from the likes of William Hague and Michael Portillo, along with the London Mayor Ken Livingstone, but we want more members to come out on our side.

“Our target remains the total abolition of IPT and we intend to succeed.”