The SNP'S chances of winning the key seat of Falkirk West were boosted yesterday when an aide to Dennis Canavan threw in his lot with the party.

Mr Canavan is standing down, having been the Labour MP for the area and then an independent MSP when he was barred from standing for his party.

Now the Nationalists have been boosted by the former MSP's closest aide backing the SNP's candidate, Michael Matheson.

Explaining his decision, Jim Lapsley said: "After much consideration I have decided to give my support to Michael Matheson.

"I know Mr Matheson has been an excellent list MSP working hard, serving the people of Falkirk and the people of Scotland diligently and conscientiously for the past eight years, and I hope you will vote for him."

Mr Matheson said: "This personal endorsement is a huge boost to the SNP team and to my candidacy, as we work to win the support of the people."

Dennis Goldie, the local council leader, is the Labour candidate hoping to win back the seat for the party which formerly held it for decades.

He played down the impact of a close supporter of Mr Canavan backing the SNP, saying: "Jim Lapsley was a good servant to the party but he defected some time ago and now he has defected again. I don't know if he will have much bearing on the result."