We just got back from a brilliant day out in London and wanted to share a fun new game we found (via Google!) on the Southbank called "Crazy Boules". It's a cross between crazy golf and french boules and the kids (and us) loved it! You have to bowl metal balls around challenging obstacle courses and the closest to the jackball wins the most points.
We were a family of 2 adults and 2 kids and the game took us about 30 minutes which was perfect. As we were leaving the staff told us that if we ever wanted to come back then to book with the discount code FAMILY5 and it would knock £4 off the ticket prices. Haven't tried it yet but if someone else does let us know! Here's the website https://www.crazyboules.com/. They close sometime in September.
Oh they also have a fun photobooth podium for the family shot at the end!