>However just checked my domains and they haven't added the .uk version of my .co.uk domain.
You need to do a whois lookup on your .uk domain as it is highly likely to not have the same expiry date as your .co.uk domain. Unfortunately with GDPR I see most of the other useful details are now cloaked, as in my case the .uk domain was still owned by 123-reg and was only transferred to my ownership on payment.