In or out? Where does your MP stand on the EU debate?
Labour and Conservative MPs from across the Black Country and Staffordshire are split over Britain's continued membership of the EU.
Find out here where your MP stands.
Wolverhampton
MPs in the city are joining forces to campaign for Britain to stay in the EU, with all three Labour MPs announcing their backing for Britain to remain part of the EU.
Emma Reynolds, Wolverhampton North East MP, said she believed Britain would still be part of the EU following the June 23 ballot, although she said she expected the vote to 'go down to the wire'. More than 90 per cent of Labour MPs have signed up for the Labour In For Britain campaign, including leader Jeremy Corbyn and the entire shadow cabinet.
Ms Reynolds said that part of the battle was to flush out the 'misinformation' that anti-EU campaigners had spread over Britain's place in the union.
"Our current position gives us the best of both worlds," said Ms Reynolds. "We don't have the euro as a currency but still have access to the benefits of EU membership.
"The argument that we have open borders is simply wrong."
Wolverhampton South East MP Pat McFadden, who is co-chair of the Labour 'In' group, said: "I'll be voting to stay because it is best for our economy, best for jobs and for our continued influence."
Wolverhampton South West MP Rob Marris has said he strongly favours Britain staying in the EU.
Staffordshire
Tory MPs in Staffordshire are split over Britain's continued membership of the EU, with Eurosceptics in the county hailing Boris Johnson's backing for Brexit as 'a big plus'.
Stone MP Bill Cash and Lichfield MP Michael Fabricant revealed they will be voting to leave the EU in June's referendum, which was announced by David Cameron on Saturday.
South Staffordshire MP Gavin Williamson and Stafford MP Jeremy Lefroy have both said they will vote to remain in the union.
Cannock Chase MP Amanda Milling is yet to declare her position.
Mr Cash, who led the Maastricht Rebellion opposing the EU treaty in the early 1990s, said he believed support for the 'leave' campaign would grow in the coming months.
"Boris Johnson's decision will be a big plus for many people," he said. "But I think that as the campaign develops more information will emerge showing why we need to leave this dysfunctional EU.
"For me this has always been about one central issue. It is the sovereignty of our Parliament and of the people that is key.
"Every elector has the right to expect that this country will be run by people that have been elected to our Parliament. People fought and died for this right.
"Bit by bit it has been taken away. In the EU we run a monumental trade deficit and have no control over our borders.
"People are starting to realise that what remains of the EU will drag us down. I firmly believe the 'out' vote will win the referendum."
Lichfield MP Michael Fabricant said he will be voting to leave the EU. A staunch believer in free trade, he said: "I think we are part of a global economy and that we will be far wealthier trading globally than the current situation.
"At the moment I think we are restricted by the EU in terms of trade."
Tory MP for South Staffordshire, Gavin Williamson, denied Boris Johnson's support for the 'Leave' campaign was a setback and said the public would decide the vote rather than politicians.
Mr Williamson, who is the Prime Minister's Parliamentary Private Secretary, said: "Every politician is entitled to have their say, but in some ways the views of politicians are irrelevant as far as this referendum is concerned.
"The views of 650 odd people in Parliament are immaterial compared with the millions of people who will be voting around the country.
"The Prime Minister has secured a number of changes regarding our relationship with the EU. It is ultimately up to the British people to decide, but I will be voting to stay in."
Stafford MP Jeremy Lefroy has also confirmed his support for the 'in' campaign.
Walsall
MPs across Walsall have declared their positions on Britain's future in the EU, with David Winnick warning a vote to leave could have a disastrous impact on trade in the region.
The borough's two Labour MPs say they will be voting for Britain to remain as part of the EU in June's referendum, while Wendy Morton, Tory MP for Aldridge and Brownhills, is one of more than 100 backbenchers who are yet to nail their colours to the mast.
It comes as David Cameron told Parliament that the country faced the choice of becoming an 'even greater Britain' by staying in or taking a 'leap into the dark' by exiting.
Walsall North MP David Winnick said he has long believed that Britain's best interests - and particularly those of the West Midlands - were best served by being part of the EU.
"I have said that Britain should remain in the EU for many years and I will be voting accordingly," he said.
"There are undoubtedly drawbacks which I would not deny, but there are far greater drawbacks for Britain if we become isolationist.
"There are 28 countries in the EU, and so many decisions affecting our daily lives would be made without our participation if we leave.
"It would also adversely affect a number of trade deals, which would have a particular impact on the West Midlands.
"The results of a 'leave' vote could well be disastrous. I will be voting to stay in the EU and strongly urge others to do the same."
Meanwhile, Mrs Morton said she would be seeking reassurances that the Prime Minister's EU deal can't be overturned by other nations before making her decision.
She said the EU has been 'drifting towards a superstate' for too long and had become more about political unity and federalism rather than economic unity.
"As a business person I completely understand the arguments that doing business in Europe is easier now than it was thanks to the free trade single market," she added.
"But the amount of gold-plated red tape stemming from Brussels is a frustration we could easily do without.
"Over the next few weeks we will all learn more about the details of the agreement, and I will be seeking assurances that it cannot be undermined or circumnavigated by other member states.
"Like many people I want to know the facts before I decide how to cast my vote."
Walsall South MP Valerie Vaz signed up to the pro-EU group 'Labour In' last year.
Sandwell
MPs from across Sandwell have declared their positions on Britain's future in the EU, with Adrian Bailey saying withdrawal would have a 'disastrous impact' on businesses in the Black Country.
Labour's West Bromwich West MP said maintaining strong trade links with Europe was vital for the future prosperity of the West Midlands. He warned that a vote to 'leave' in June's referendum could lead to a huge loss of investment in the region.
It comes as David Cameron told MPs the country faced the choice of becoming an 'even greater Britain' by staying in or taking a 'leap into the dark' by exiting.
He is one of three of Sandwell's MPs - including Labour's deputy leader Tom Watson - to announce they will be voting for Britain to remain in the EU. Warley MP John Spellar has yet to declare his position.
Mr Bailey, who has a history of taking a pro-Europe stance, said: "It is vital that we stay in the EU, chiefly from a business point of view.
"The EU is crucial for our trade and anything that compromises that has to be opposed. It is not only JLR that is crucial to the economic prosperity of the West Midlands. Tata Steel have invested here in part due to the UK's access to the European market.
"Coming out of the EU would open up the possibility of us losing a lot of investment.
"We would be left with the worst of all worlds. If you look at Norway, which has access to markets but is not part of the EU, they are in a position where they have to conform to regulations but have no say in what goes on.
"That sounds like a pretty poor deal to me and one which I am strongly opposed to."
Meanwhile Labour's deputy leader Tom Watson, who is also MP for West Bromwich East, is firmly in the 'yes' camp.
He said: "To me being European and in the EU is part of our national fabric. It's actually part of what it means to be British. I can't opt out of that."
Halesowen and Rowley Regis' Tory MP James Morris has also confirmed he will be voting to stay in Europe.
"After considerable thought I have decided to support Britain remaining a member of a reformed EU," said Mr Morris, who is Private Parliamentary Secretary to the Minister of Europe.
"The EU is far from perfect...but on balance I believe that if we want to protect jobs and growth here in Halesowen and Rowley Regis, and the wider Black Country, our interests are best served as a member of the EU."
Warley MP John Spellar said: "I am yet to declare my position over the referendum."
Dudley
Defiant Tory MP Mike Wood has pledged to campaign for Brexit - while other MPs across the Dudley borough are in favour of Britain staying in the EU.
The Conservative backbencher, who represents Dudley South, has come out in favour of pulling out of the union.
While MPs Ian Austin, Margot James and James Morris have all confirmed they will be voting to stay in Europe.
Mr Wood described David Cameron's renegotiation deal as 'a long way short of what is needed' as he announced he will be voting for Britain to leave the EU in June's referendum.
He added: "I know that some people have said that the deal that David Cameron achieved is meaningless. I disagree.
"I think that it probably was the best deal available and that the changes are certainly worth having.
"However, my personal view is that the new deal falls a long way short of what is needed and so the time has come for Britain to build a new role outside of the EU."
Meanwhile Labour's Dudley North MP Ian Austin said that he had made the 'difficult decision' to vote 'in' due to the unknown risks of leaving the union.
"Some people tell us leaving would solve all our problems, others think everything the EU does is wonderful and we should integrate even more," he said.
"I think most mainstream people think there are both benefits and costs to our membership, and while there would be some advantages to leaving, there would be big risks too.
"I can see both sides of this debate and it is a difficult decision, but I am concerned about the impact leaving could have on the economy, trade and jobs, particularly in an area like ours where manufacturing and exports are so important.
"I think it makes sense to be part of a group of nations committed to peace, security and democracy."
Margot James, Tory MP for Stourbridge, said she will be voting to remain in the EU, despite admitting she had been 'sorely challenged by EU bureaucracy'.
"Undoubtedly the EU faces unprecedented problems with migration, the single currency and competitive pressures from high growth markets," she said.
"The UK is already insulated from the main problems with which the EU is grappling. We are not part of the single currency, and we are not part of the border-free Schengen Agreement.
"Britain is part of Europe. This fact will remain whatever the result of the referendum."
Halesowen and Rowley Regis' Tory MP James Morris has also confirmed he will be voting to stay in Europe.
"After considerable thought I have decided to support Britain remaining a member of a reformed EU," said Mr Morris, who is Private Parliamentary Secretary to the Minister of Europe.
"The EU is far from perfect...but on balance I believe that if we want to protect jobs and growth here in Halesowen and Rowley Regis, and the wider Black Country, our interests are best served as a member of the EU."