David Cameron and George Osborne fly in for Midlands visit

The Prime Minister and Chancellor George Osborne's battle bus rolled into the region as the pair made a pitch for another term in office.

And Mr Cameron stressed he hoped to spend the whole of the next five years in Downing Street, following speculation that he would leave early in the next term to make way for his successor.

The Prime Minister had fired the starting gun when he admitted he did not think he would want to go for a third term in 2020, a move branded arrogant by critics.

Speaking on a visit to the Marston's-owned Banks's Brewery in Wolverhampton, Mr Cameron praised the growth in companies in the supply chain as well as the £500 million investment by Jaguar Land Rover at the i54 business park, off the M54.

The Tories have been backed by more than 100 business leaders, including Marston's chief executive Ralph Findlay and Staffordshire-based JCB chairman Lord Bamford, in a letter warning "a change in course will threaten jobs and deter investment".

Hailing the economic revival of the Midlands, Mr Cameron said there were signs of far more success than just the Jaguar Land Rover engine plant which he has visited and repeatedly praises.

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He said: "I remember going to some of the components suppliers to the automotive industry and that brought home to me that you've got the big brands and the big investments but it's the pull through to the others that makes the big difference."

He added: "We want a re-industrialisation of Britain, a more balanced recovery between manufacturing and services. This didn't happen under Labour. It's happening under the Conservatives and if we stick to the long term economic plan it will go on happening."

The Prime Minister and Chancellor arrived by helicopter to Wergs Golf Club in Wolverhampton before being taken in a Jaguar to Marston's which is undergoing a major redevelopment.

It has spending millions on the beer and pubs company's office building.

Around 500 people have temporarily moved over the road from Marston's House to Coniston House.

The pair were followed by a Conservative battle bus, decked out entirely in blue, which was carrying the national media pack.

The Tories have pledged not to raise income tax, VAT or National Insurance Contributions if they are returned to power after May 7.

Labour has accused the Conservatives of wanting to look after "a few big firms and individuals at the top".

Ed Miliband is also planning to outlaw "exploitative" zero-hour contracts and guarantee workers the right to a regular contract of 12 weeks working regular hours in practice with an employer.

Meanwhile, Labour has said it is the only party that will tackle the "unfair" bedroom tax, according to the party's welfare reform chief.

Helen Goodman, the shadow welfare reform minister, made the comments yesterday during a visit to the Midlands.

Ms Goodman joined Labour's parliamentary candidate Councillor Pete Lowe going door to door in Stourbridge to raise support for the party at the next general election.

She claimed 45,000 residents in the West Midlands have been hit hard by the law.

Ms Goodman said: "I have been meeting people who have been affected by the tax and that has been very concerning.

"I spoke to a man and his wife where the man has very bad health issues so he is bedridden, and because he needs a special NHS bed and lots of kit, there isn't room for his wife to sleep in the same bed so she needs a different room, so they are being stung. It is ridiculous."

The bedroom tax – also known as under occupancy charge or the Spare Room Subsidy – means people can receive less in housing benefit if they live in a housing association or council property that is deemed to have one or more spare bedrooms.

Ms Goodman said the tax targets the most vulnerable people of society, with many not even aware they could be at risk.

"The thing is, people do not get the opportunity to move, because there are not enough small flats or bungalows for people to move into so they are stuck with this whopping £790 a year bill," she said. "And all the time new people are having to pay it. Every month, another 18,000 people get caught in this net as their circumstances change.

"I would say it unfairly targets the most vulnerable of society."