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Britain's biggest union tonight accuses the Brexit Minister of trying to weaken asbestos laws while he was a backbencher.

Unite highlighted a series of questions tabled by Steve Baker, who was last week handed a plum job negotiating the UK's exit from the EU, which it says prove he wants to water down health and safety protections.

The union urged the Government to guarantee asbestos laws would not be watered down as Britain leaves the EU.

In October 2010 Mr Baker asked the Government to “bring forward proposals to amend the provisions of the Control of Asbestos at Work Regulations 2002 to distinguish the white form of asbestos and the blue and brown forms of that substance”.

(Image: Sky News)

He also called for “an inquiry into the appropriateness of the health and safety precautions in force in respect of asbestos cement”.

Mr Baker was also mentioned in a 2015 report by the Conservative Rural Affairs Group which makes a distinction between inhaling blue and brown asbestos, and the white form.

The CRAG wanted to able to use asbestos cement sheets on farms.

The summary, available online, says: “The possibility of a UK derogation to allow the re-use of end of life asbestos cement sheets on farms was debated at the AGM of the Conservative Rural Affairs Group (CRAG) on 6th May 2009, since when CRAG has lobbied for such a derogation.”

Unite's assistant general secretary Gail Cartmail said it was “alarming that an MP who holds such extreme views on asbestos has been given such a sensitive position”.

She added: “It demonstrates the Prime Minister is more interested in appeasing hardline Brexiters rather than the welfare of workers

(Image: Getty)

“Following these revelations it is essential that very senior Government ministers give a cast iron guarantee that the existing asbestos regulations will not be weakened or modified and the safety of workers will remain the priority.

“With thousands of people dying every year, directly as a result of being exposed to asbestos, the priority must be to ensure that the existing safety laws are adhered to and employers who ignore this life saving legislation are prosecuted and convicted.”

EU rules, including tough laws on asbestos, will be passed into UK law through the Repeal Bill, which was outlined in the Queen's Speech.

Ministers have said each law can be scrapped, amended or left unchanged over the coming years.

But critics fear the Government will use a series of parliamentary tools to dodge proper scrutiny.

Latest Health and Safety Executive figures show 2,515 people died in 2014 after developing mesothelioma, the incurable and fatal cancer of the lining of the lungs, caused by inhaling asbestos.

The Mirror contacted the Department for Exiting the European Union asking for a comment, but it is yet to provide a response.