GORDON Brown and David Cameron are squaring up for their final Commons clash before the General Election.

The last Prime Minister's Questions (PMQs) before the dissolution of parliament on Monday (April 12) is set to be a brutal exchange as each man seeks to make the running at the start of the month-long campaign.

It comes after yesterday’s announcement that the general election would be held on May 6 - with the outcome said to be more uncertain than at any election since 1992.

The Sun's daily YouGov poll put the Tories on 40 per cent (down one), Labour on 32 per cent (up one) and the Liberal Democrats on 17 per cent (down one).

The Prime Minister and the Tory leader will both keep up the hectic early pace of campaigning with a series of engagements straight after their Commons showdown.

News Shopper: David Cameron is off to the north of England on the campaign trail

Having already journeyed to Birmingham and Leeds on Tuesday, Mr Cameron is set to visit Bolton where he will visit a large business to underline his opposition to Labour's national insurance rise.

The Tories were boosted by more prominent businessmen publicly supporting their pledge to scrap the bulk of the NI rise pencilled in for next year.

They included Peter Simon, the founder of fashion group Monsoon, Bob Wigley, the former chairman of European operations for Merrill Lynch, Ocado chief executive Tim Steiner, and Nick Robertson, founder and chief executive of the successful dotcom clothes retailer Asos.

The Prime Minister is expected to limit himself to London but keep up the interaction with voters after a trip out to key battleground seats in Kent yesterday.

News Shopper: Gordon Brown is preparing for a PMQs showdown

He will be making a speech in the capital, in which he is expected to address constitutional reform, including his commitment to a fully elected House of Lords.

It was reported he would also promise to introduce four-year fixed-term parliaments that would remove from prime ministers the power to call general elections.

However, Lib Dem leader Nick Clegg will accuse both Mr Brown and Mr Cameron of blocking electoral reform.

News Shopper: Nick Clegg insists the election will not be a two horse race

"In the campaign over the next four weeks you will hear a lot about political reform," he will say at a press conference.

"David Cameron will talk about cutting the cost of politics.

"Gordon Brown will talk about reforming the Lords.

"Their words are a smokescreen for the truth - both of them would do anything to protect the corrupt two-party stitch up and secrecy of Westminster."

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