Empiredirect.co.uk have the Oral B Triumph with SmartGuide for £54.99 which is the best price I can find anyway but there is also the 10% off code from Paypal (only valid til 24th Dec!) and Quidco which brings the price down to £48.
There's also free standard delivery.
Apparently it's the Which? Best Buy 2007 for electric toothbrushes.
First deal post - please be gentle :-)
Ok, now amazon have got it for £49.99 so after the empiredirect code runs out today that's still pretty cheap