The domain in question is lhlc.org.uk. The name resolves correctly but when using Pingdom DNS Check it says that errors were found: http://dnscheck.pingdom.com/?domain=lhlc.org.uk×tamp=1374325758&view=2
If it works correctly, is this even a problem?
The error given states that 'Superfluous name server listed at parent'. I've spent ages trying to work out what is causing this. My initial thoughts were that the NS records were incorrect but I've double checked them and they appear correct.
The name servers for the domain are ns5.whealmedia.com -> ns9.whealmedia.com. They are setup as vanity name servers with DnsMadeEasy. whealmedia.com is setup with a similar configuration but is using name servers ns0.whealmedia.com -> ns4.whealmedia.com and backup DNS with DynECT. This domain doesn't appear to have any problem: http://dnscheck.pingdom.com/?domain=whealmedia.com×tamp=1374326429&view=2