Current law in the UK is 10% plus 2 mph, which I think is fair? Majority of drivers seem to have a default of limit plus 20% which results in a lot of tailgatin

Current law in the UK is 10% plus 2 mph, which I think is fair? Majority of drivers seem to have a default of limit plus 20% which results in a lot of tailgating for those of us who insist of staying legal.