UK trade body UKIE, as part of its 30 Years of Play campaign, handed out numerous awards to games that have sold over 1m copies in the UK.
https://www.gamesindustry.biz/articles/2019-04-12-every-game-to-sell-over-1m-copies-in-the-uk
https://ukie.org.uk/event/2019/04/11/30-years-play-uk-best-selling-game-awards
In addition to the million sellers club, UKIE and GfK also called out UK-made games that have sold over 600,000 boxed copies in the UK. This includes the likes of Colin McRae Rally, Kinect Sports, Forza Horizon 3, LittleBigPlanet, Tomb Raider, The Getaway and more. Full list is below. ]