To the surprise of pretty much nobody, Ubisoft's Watch Dogs has claimed the top spot in the UK multiformat chart — but Mario Kart 8 has sped into second place, causing a massive spike in Wii U console sales.

According to Chart Track, the PS4 and Xbox One versions of Watch Dogs claimed the top two spots, with Mario Kart 8 effectively coming in second and pulling ahead of the 360 and PS3 editions of Ubisoft's open-world hacking adventure — the Wii U version of which has been delayed.

Eurogamer is reporting that Wii U hardware sales have grown a staggering 666 percent during the Mario Kart 8's launch week (something that will no doubt please Iron Maiden Fans), with 82 percent of those sales being the Mario Kart 8 hardware bundle.

Were you one of the many UK gamers who took the plunge with the Wii U last week? Let us know with a comment.

[via chart-track.co.uk, eurogamer.net]