PERTH, SCOTLAND - MAY 14:  George Osborne, the Shadow Chancellor, gives a key note speech at the Scottish Conservative party's spring conference on May 14, 2009 in Perth, Scotland. The conference comes on the day that conservative MP Andrew MacKay quit due to an 'unacceptable' expenses claim. Getty Images logo Getty Images 6 months ago

PERTH, SCOTLAND - MAY 14: George Osborne, the Shadow Chancellor, gives a key note speech at the Scottish Conservative party's spring conference on May 14, 2009 in Perth, Scotland. The conference comes on the day that conservative MP Andrew MacKay quit due to an 'unacceptable' expenses claim.