Tomb Raider: Definitive Edition is currently £10.49 for PS+ members on the Playstation Store. If however you prefer your games to actually exist in the form of physical media then 365Games have both the Xbox One and PS4 versions for only £13.49.
"11 months on and Tomb Raider has lost none of its initial magic. In fact, it's just walked in and took the crown for the best action game on the PS4 or Xbox One. The new experience-enhancing controller features and voice-commands on the PS4 and the often startlingly-gorgeous visuals do indeed make this the Definitive Edition of one of the all-time greats." - Tomb Raider: Definitive Edition Review - The Best Yet (10/10)