WORCESTER'S MP today leads a passionate rallying call urging Scotland to reject independence - after being tasked with investigating the issue on behalf of parliament.
Since May the city's MP has spent time examining the pros and cons of Scottish independence, including visits to Glasgow and Edinburgh, as well as lengthy evidence-taking sessions in London with an array of key players and economic experts.
His work, done alongside a panel of MPs sitting on the business, innovation and skills select committee, is being published today for the benefit of the Government and country as a whole.
Mr Walker says during the investigation he has become convinced both England and Scotland would suffer if they were apart - and that the impact will be felt even in areas like Worcester.
He has also accused some pro-independence campaigners of being "sinister" by trying to scaremonger.
His defence of the union is among the most passionate from parliamentarians since Mr Cameron said a 'yes' vote would "break" his heart.
Mr Walker said: "Let's be absolutely clear, there are real problems with the independence campaign.
"I do think there is something sinister about the amount of pressure being put on people, by those claiming staying part of the union would cost Scotland.
"When we took evidence we found so many claims about the economics of it just do not stack up.
"There would be a loss to businesses, to the university system, to pensions and that deeply worries me.
He also said companies "on both sides of the border" would suffer if the yes vote wins.
A squeeze on university funding would mean less places for students in Worcester looking to join an institution north of the border, while if city businesses ties loosen with Scottish firms, that could also affect their trade.
Mr Walker said: "It poses a risk to businesses on both sides of the border and to the universal postal service provided by the Royal Mail.
"During our visits to gather evidence I was deeply concerned by the fact that some of the businesses and groups who gave us evidence seemed to have been intimidated by the Scottish Government and were afraid of speaking out about their concerns on the risks of Independence.
"Despite this the evidence and the conclusions of the cross-party select committee are very clear."
The vote on Scottish independence is on Thursday, September 18.