Should the Tories fear these poll numbers?

Courtesy of Political Betting, the headline figures from the latest MORI poll:

Conservatives — 40 percent (down 5)
Labour — 37 percent (up 7)
Lib Dems — 12 percent (down two)

Opinion polls have been varying wildly over the past couple of weeks, so it will be interesting to see if – and how – they settle after the PBR.  In the meantime, numbers like these will fuel the idea that Brown’s set to call an early election.