I rarely bike because I don't trust drivers, and you can't bike on the sidewalk.
That means a 13 year old trundling down a 5 meter wide footpath to the local shops on Sunday morning is up for a $428 fine, roughly 23 hours of adult minimum wage work.
It seems to be seldom enforced, but it is doing a good job at what I think is the main objective - keeping people off bikes and in their car paying road tolls to the government and their private contractor businesses.
https://www.gov.uk/guidance/the-highway-code/rules-for-cycli...
Cops never bother to enforce it that I’ve seen tho’