Looks like the likely top prize on these is 50 GBP. From https://www.gamblingcommission.gov.uk/for-gambling-businesses/Compliance/Sector-specific-compliance/Ar

Looks like the likely top prize on these is 50 GBP. From https://www.gamblingcommission.gov.uk/for-gambling-businesses/Compliance/Sector-specific-compliance/Arcades-and-machines/Skill-with-prizes-SWPs.aspx https://www.gamblingcommission.gov.uk/for-gambling-businesse...: "What is the maximum stake/prize on an SWP? As you don’t need a licence or permit there is no legal limit for stake or prizes. However, it would be very difficult to manufacture a genuine SWP machine that is economically viable and offers prizes over £50 (the prize limit set by the industry trade body following discussion with us). We would be likely to raise questions about machines with prizes above this range."