Hi James
I use screw fix I find it a lot cheaper for good quality stuff than
Argos
Here is a link to all cordless drills
http://www.screwfix.co.uk/app/sfd/ca...ortby=lowFirst
And a link to an 18 volt drill which will take 10mm bits at £39.99
http://www.screwfix.co.uk/app/sfd/ca...44843&id=75943
Hope it helps
Tom