Doesn't happen in France. You have to take a course and do a test. There are also sea-borne gendarmes who may stop you to check if you have the right equipment on board.Whilst it's nice to have some activities in the UK that don't require a tax, licence, ticket etc of some sort, it always amazes me that people can buy a boat, tow it to the sea and throw it and themselves in and blast off without any formal training or qualifications...
We'd always find there were those that would have their boat parked on their driveway for 10 months, chuck it in the sea, shoot off and wonder why things failed out at sea.. no maintenance, no filter changes, nothing...