How do you take delivery of anything that is sent via a courier, requires a signature, and not using Royal Mail?
You'll have to direct us to where they did that because, for one thing, every new .uk 2LD is an extra expense although not a mandatory one. Nominet also anticipated that companies would have new stationery and new signs printed during the normal course of business, but any entity switching to a new .uk 2LD prior to their stock of stationery depleting completely or before their signs needed reprinting would obviously incur additional expense.
Nominet always stipulated that a UK address would be a requirement and that PO Boxes were not suitable. It probably wouldn't be against the rules of your tenancy to put the address where you reside in the WHOIS but I presume you don't want people visiting you unannounced.
I don't see any other solution.
I know you like to be pedantic, but the fact is I'm overseas a great deal - that means post being held for me while I'm away and I trust Royal Mail to do that more than I would a private mailing service.
Nominet have put a policy in place which I am questioning. I've yet to receive any satisfactory answer.
And it is against my tenancy agreement to use my address for business purposes, although not to work from home.