[bitfolk] IP address at Nominet's nameservers is wrong

I am having problems with this - despite updating them (again) today, it is still showing the old IP address for one of the nameservers: Here's the BIND record, with the domain name changed: $ttl 10800 example.co.uk. IN SOA sub.example.co.uk. example.gmail.com. ( 2012021001 7200 3600 604800 10800 ) example.co.uk. IN NS sub.example.co.uk. example.co.uk. IN NS top.example.co.uk. example.co.uk. IN A 85.119.83.xx sub.example.co.uk. IN A 85.119.83.xx top.example.co.uk. IN A 85.119.83.yy mail.example.co.uk. IN A 85.119.83.xx ns1.example.co.uk. IN A 85.119.83.xx ns2.example.co.uk. IN A 85.119.83.yy *.example.co.uk. IN CNAME sub example.co.uk. IN MX 10 mail.example.co.uk. But here is what Nominet's whois says: Relevant dates: Registered on: 21-Apr-2009 Renewal date: 21-Apr-2013 Last updated: 10-Feb-2012 Registration status: Registered until renewal date. Name servers: sub.example.co.uk 212.13.195.xx top.example.co.uk 85.119.83.yy WHOIS lookup made at 12:42:49 10-Feb-2012 Note old IP address for sub.example.co.uk, even though the A record is clear it's the new address. Any suggestions as to what's going on gratefully received... Ian