Its registered, the registry gives up the NS server, the NS servers have a master zone with NS records which match. Don't get it.
Doing a DNS Lookup (via DNSStuff) gives:
; DiG ANY gen.net.uk +all
Referral:
;; Searching for gen.net.uk ANY record.. Received 239 bytes from 127.0.0.1#53(127.0.0.1) in 16 ms
;; Searching for gen.net.uk ANY record.. Received 708 bytes from 192.58.128.30#53(j.root-servers.net) in 175 ms
;; Searching for gen.net.uk ANY record.. Received 632 bytes from 156.154.100.3#53(nsa.nic.uk) in 325 ms
;; Searching for gen.net.uk ANY record.. Received 278 bytes from 217.36.11.19#53(ns0.gen.net.uk) in 140 ms
Which seems totally consistent with how its setup. Maybe I'm missing something obvious here, but I don't think so. Would greatly appreciate feedback?