Has been cheaper before. This is slighty cheaper on Tesco Direct, however this qualifies for a free add-on pack ranging from £7.49 to £12.99
Best price I can find currently.
Included in the LEGO Dimensions Starter Pack; LEGO Dimenions Video Game, LEGO Toy Pad, Bricks to build the LEGO Gateway, 3 LEGO minifigures - Batman, Gandalf (Lord of the Rings) and Wyldstyle (Lego Movie), LEGO Batmobile vehicle.
Build the minifigure heroes and fire-up the game to start the experience, then follow the in-game build instructions to assemble the loose bricks into the LEGO Gateway and place the structure on the LEGO Toy Pad. Expand the adventure by collecting more minifigures, vehicles, gadgets and new levels with the purchase of three different types of expansion packs. Use whatever minifigure with whichever vehicle or gadget - go ahead . . . Break the rules.