Just been to Tesco extra Huntingdon for some shopping, got a till spit for £25 off a Lego dimensions starter pack. Currently selling for £28.49 for Xbox one and Xbox 360 (think PlayStation versions were £36 odd). Staff confirmed that the voucher was valid and I got the 360 version for £3.49. No idea if it's national or just our store as the till staff knew nothing about the voucher till I gave it too them.
Lego Dimension starter pack xbox version £3.49 at Tesco Huntingdon instore with voucher