New plans to change MPs’ seat boundaries will finally be unveiled on Tuesday after Tory ministers wasted £14million on two failed shake-ups.
The Boundary Commission for England will publish its initial plans to redraw the Westminster map for the first time since 2010 - after ministers binned off years of work they did in 2013 and 2018.
This time the final recommendations will take force automatically, unless ministers kill them off with an Act of Parliament.
But the changes will only come into effect in late 2023 - which will be too late for the next election if Boris Johnson decides to call it early.
The review is designed to end the unfairness of some MPs having only 50,000 constituents while others are shared by 100,000.
Seats will be redrawn so they have between 69,724 and 77,062 registered voters each.
Unlike previous reviews, this one will not change the overall number of MPs in Parliament - which will stay at 650.
But polling experts have suggested the review - which will add 10 seats in England while cutting eight from Wales and two from Scotland - will hand an extra 10 seats to the Tories.
It will also be based on where voters lived on 2 March 2020, before the Covid lockdowns - meaning it will be years out of date when the review takes force.
It comes after 11 years of red tape and U-turns over failed attempts to change constituency boundaries in Westminster.
The 2013 and 2018 reviews would have each cut the UK’s 650 seats to 600 - sparking a bunfight between MPs who were set to lose out.
But the 2013 review was halted while the the 2018 review was thrown out at the last minute by the Tory government. Each cost £7m.
Ministers now say the number of constituencies will remain at 650 and, after the next one, reviews will only happen every eight years.
The new review is budgeted to cost £2.5m in England, with Commissions in Scotland, Wales and Northern Ireland due to publish their plans separately.
England’s initial proposals will be published on June 8, with an eight-week consultation closing on August 2.
A second consultation with public hearings will happen over six weeks in Spring 2022, followed by a final four-week consultation on revised plans in Autumn 2022. Final recommendations are due by 1 July 2023, after which the government has four months to change the law.
Furious political rows tend to break out over where the map is drawn, and public feedback changed 50% of the initial plans in 2018.
