Typical.. WHMCS, I totally hate that attitude... its rife within the tech world, and it honestly stifles our collective growth because the attitude continues like a cancer and perpetuates.
I'm surprised no one has developed a competitive answer to WHMCS (yes there are others but) something that literary draws massive amounts of users to much more friendly and polished billing app. WHMCS in 2015 "to me" still looks as dated as is it did 5 years ago or longer IMHO... but its the only thing that gets the job close to done, so this is what we put up with... for now...
Sorry but I got to laugh!!!, as i've done ZERO!... when you look at how the whole domain situation started and has continued, its a bit of a none-starter, however its good that .uk domains are only for those who have the .co.uk for the time being, or has that ended now? (need to go check)
I need to stop forum'ing and "fix" my "custom" template!... which only had CSS changes nothing else!