It’s a fair point about notice periods, but due to the competitiveness and psychology involved in football management, I don’t think it would really work in football/nor would any club actually want to keep a manager on after he’d agreed to join another club.
Slightly off-topic, but I’ve always felt notice periods work on goodwill in most businesses.
Obviously if a business got rid of someone without a notice period/redundancy it’d end up in court and the employee would win the case.
But in 99% of cases, what would actually happen if an employee left a company to join another one and declined to work their notice period? I imagine nothing?