Superdrug have a number of Oral-b deals - this weekend only. I think this is the best one. Add a packet of 4 brush heads for a tenner and get free delivery (http://www.superdrug.com/electric-toothbrushes/braun-oral-b-precision-clean-brush-head-refills-x4-pack/invt/166952/). Then use the following voucher if you are a first time shopper and get 15% off.
Don't forget cashback sites also.
Oral B Professional Care 500 Electric Toothbrush has 7,600 Rotations per minute, clean mode.
* Gently Removes Plaque
* Easy to Use Brush Mode
Oral B Professional Care 500 is an advanced toothbrush system delivers outstanding plaque removal with 3D cleaning Technology
It's easy to use, with just one brushing mode - yet still removes twice as much plaque as a standard manual electric toothbrush. It's gentle, too, surrounding each tooth for a deep clean white stimulating gums
2 Minute Timer
A timer in the Oral B Professional Care 500 handle helps ensure you brush for a full two minutes.
Oral Care Mega Weekend - Save up to £40.00