If anyone's interested, I just bought myself a new Bosch 18v brushless twin pack (drill/driver and impact driver), 2 x 4AH batteries, charger and case for £225 delivered on Saturday from Powertool World, just arrived and charging so will report on how good they are soon (hopefully!). https://www.powertoolworld.co.uk/bosch-18v-twinpack-dynamicseries-gsb-gdr-18v-4ah