Plans to create a huge regional police force should be put directly to residents in a referendum, according to Conservative MPs.
They called for a public vote on plans to merge West Midlands Police, West Mercia Police, Staffordshire Police and Warwickshire Police into one superforce.
Peter Luff (Con Mid Worcestershire) and Owen Paterson (Con North Shrop-shire) have written to Charles Clarke, the Home Secretary, demanding a ballot on the issue.
West Mercia has formally rejected the proposals, ensuring there will need to be a further four-month consultation.
However, the final decision will be made by MPs in the House of Commons, who will vote on recommendations by Mr Clarke.
The Inspectorate of Constabulary, the official police inspection service, has warned mergers are needed because smaller forces do not have the resources to deal with terrorism and organised crime.
This claim has been rejected by West Mercia Police, which was named the most effective police service in the country last year.
Mr Luff said: "The Govern-ment's plans ignore the extremely high ratings West Mercia has won from independent assessors and the detailed proposals by West Mercia to spend £2.9 million from their own funds to enhance the provision of protective services in West Mercia to the level of a strategic police service.
"Not one of the 13 MPs in the West Mercia force area has publicly supported the proposals and neither has any local authority at county, unitary or district level."