Helen at Nom just sent me the info I need to make this change. This name shows up in my account on Nom's side of things, just not in registrat details.
Actually, I'm glad people pointed this out, 2 others of mine also say NULL and I'm fixing those today as well. I love Moniker for .coms, but I wish they'd get better at .uk name management!
Potential buyers: At your request, I will have the whois listing corrected to list my name before you pay me. And please feel free to call Nom to confirm that it is mine