First deal post, hopefully it is of use to someone.
Sigma 70-300 DG Macro II Lens for either Canon or Nikon (both are reduced).
Found this tonight whilst looking for another lens. Cheapest delivered price according to camerapricebuster is £124.99 from Jacobs. This works out at £103.29 delivered, and 1.5% quidco available.
Canon - 556/1355
Nikon - 556/1362
Direct link is to Canon version.