Morley is a very plausible example. He could even be signed in the Championship as a 28 day injury replacement! I’d like to think if he did get a Championship spot but then lost it, he’d be allowed back at Kent ‘in the interests of British Speedway’.
However continuing to use Morley as an example, it’s harsh on the rider that replaced him at Kent to then lose his place himself. Or if Kent couldn’t get a rider of a similar ability, then it could affect their product by putting out a vastly inferior team with no number 1.