ENGLAND — The Labour Growth Group published a policy report titled An Honest Day, calling for a rise in capital gains tax to fund a 2p cut in national insurance. The document was written by group director Mark McVitie and co-written by Chris Curtis, the Member of Parliament who chairs the group, and set out a series of proposed reforms across tax, energy, water and the structure of central government.

The report recommended that mayors in England be given greater powers over tax and spending, and proposed the creation of a new Department of the Prime Minister. It also called on ministers to allow Thames Water to fail.

On energy, the report recommended refocusing British policy on the affordability of clean power rather than the amount generated. The document stated: "Clean power is not the problem. The problem is a system that can build clean generation while failing to get enough of it to households and productive firms at a price they can afford."

A supporter of the report described it as "a really radical programme that backs working people, cuts the cost of essentials, and takes on the interests profiting from Britain not working." The report was also shared with Andy Burnham.

The Labour Growth Group is allied to Health Secretary Wes Streeting, who has told allies he is ready to launch a bid for the leadership should the government collapse. Curtis, who is close to Streeting, has called for the prime minister to resign in the last 48 hours.