Found this today in my local Tesco reduced from £97 to £75 then to £55 so I checked on line and found you can get them for £49.50
Doctor Who Voice Interactive Dalek
Catalogue number: 201-0731
The Doctor Who Voice Interactive Dalek is a radio controlled 18 character. This action figure is voice programmable with a room guard and enemy locator mode. Dalek requires 4 x D batteries (Order 2x 100-7567 each for £2.64 for 2) and 1x 9V battery (Order 1x 100-0736 at £2.64 for 1).