One of our authoritive DNS servers, secondary-dns.co.uk, has died. We are carrying out an emergency migration on to new hardware.
DNS services are still running, albeit only on the Primary Name server. This time period is considered 'at risk'.
The new server should be up and running in the next hour or so.
The replacement server is serving zones correctly, but customers who use secondary-dns.co.uk as a secondary to their own nameserver may not have their zones served yet. The reason is that the backup of zone files that we slave for customers is out of date. Rather than serve potentially incorrect records, we're simply not serving those zones but this means customers who use secondary-dns.co.uk as a secondary to their own nameserver should send it a notify to trigger a zone transfer. This does not affect domains for which we provide primary DNS.