g2server.co.uk has no CNAME records.
Question and response
Question
dig g2server.co.uk. NS
Answer
The response has no answer records.
Authority
co.uk. 10800 SOA dns1.nic.uk. hostmaster.nominet.org.uk. 1771951226 900 300 2419200 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0