Only on Saturday night, Iain Dale wrote:
Brown to Spotlight Immigration in Bid to Woo Back Middle England
A reader tips me off that according to a government minister he spoke to tonight, Gordon Brown sees immigration as the issue which will set him back on the straight and narrow. He will be making a big speech on it in the next couple of weeks. Apparently he's been on the phone to Michael Howard tonight asking to borrow his dog whistle.
It seems that David Cameron beat him to the dog whistle.