No rights
Sorry, but that is illogical and flawed. Observing the cause and effect of .uk on the different extensions is no substitute for rights.
Nobody not even Trademark holders, .com registrants, limited companies, businesses, .co.uk owners, UK governement, .org.uk holders, .me.uk and previous owners of domain names has legal rights over any yet to be released domain.
In the world of no real legal rights for anybody, maybe it should be first come first served for all .uk domains?
Future ownership of a newly released domain will be based on what is considered "right" by the powers that control the release of that domain tld.
Many factors such as precedent, time, existing situation, future situation, objectives, history, pressure, perception, promises, common sense, personal agenda's, prior marketing, real world, projections, alternatives, law, t & c's, rules, safety, fairness, trends, 80/20 rule, simplicity, debate, concensious, fear and money with many more will determine what is "right".
p.s. Congratulations Systreg on your wise but true 5,000th post, live long and prosper!