Dishonored 2: £16
Batman: Return To Arkham: £10
F1 2016: £14
Hitman: The Complete Season: £17
PES 2017: £10
Shantae and the Pirate's Curse: £5
The Witcher 3: GOTY Edition: £17
Trackmania Turbo: £12
Yooka-Laylee: £24
There's more stuff on sale but that's the stuff with the biggest discounts. US is having a similar sale (but not identical).