But a lot of UK clubs/schools insist that you fly at least every 28 days otherwise you have to do a club/school check with an instructor. Thus guaranteeing a nice line of income for the club/school.
Our club has this, but as it's non-profit making and has no employees, no-one stands to gain apart from an instructor getting half an hour's money. It's just a sensible bit of practical safety - seems good to me.
B