Hardly a notable domain, suspect 99% of users are in the domain industry.Domainlore.uk is a .uk!
A number of the original .uk top levels were already in use outside of Nominet control (as part of the original .uk delegations), so again not really what the thread is asking.Also, the Police and various government depts have used it since before it was available for public registration; NHS.uk and MOD.uk for example.
Decent blog post explaining why they did it, its over a year old but I hadnt read it before... https://www.heartinternet.uk/blog/why-we-moved-to-uk/
Didn't Heart moved because of penalty, I'm sure I read that somewhere.
last month I was told by 2 nominet Representatives (channel account manager) that in July and August .co.uk holders can register their .uk for free if they apply for 2 years. It was on a little Domain Conference in Germany.