It's a fifty year lease, there's absolutely no security issue.
Hull City Tigers Limited don't have a 50 years lease. The SMC have a lease which says the sports hall should be used as a sports hall. All the Council have to do is write to the appropriate body and say they are looking at the validity of what has happened. If they do I suspect there will be no Category 2 status in April. It all comes down to whether Brady is all mouth and no trousers.