MPs have rejected a plan which could have seen the political map of Leicestershire redrawn before the 2015 General Election.
Yesterday the Government was hoping to get approval for a review of constituencies that would see the number of MPs cut from 650 to 500.
However the Liberal Democrats voted with Labour against their Conservative Coalition partners.
By 334 votes to 292 they voted accept changes made by peers which mean the boundaries will not be redrawn until at least 2018.
Under the changes the existing North West Leicestershire constituency would have been split and Coalville would have been linked with Keyworth, 24 miles away in Nottinghamshire.
Current Tory MP Andrew Bridgen voted with the Government despite the fact it would have meant his constituency would have been carved up.
He said the move would have saved £25 million a year as there would be 50 fewer MPs and ensured constituencies with equal populations.
He told the Mercury: "It's a conspiracy against the Conservatives between Labour, the Liberal Democrats and the minority parties and I hope they feel a twinge of conscience.
"However this will change eventually but it means we will fight 2015 on the same boundaries. I will continue to represent the people of North west Leicestershire until they tell me they want someone else.
"I have always supported the review and just because the Boundary Commission came back, independently with a recommendation that I was a victim of, I didn't feel I could change my position."
North West Leicestershire Labour spokesman John Legrys said: "I am pleased. Putting Coalville with Keyworth was one of the more eccentric proposals of the Boundaries Commission."
North West Leicestershire Lib Dem Chairman Michael Wyatt said: "Putting Coalville with Keyworth would have been an electoral disaster."
The other major change for Leicestershire would have been move Lutterworth from the South Leicestershire constituency and put it with Daventry in Northamptonshire.
