Apex domains cannot have CNAME records.
Question and response
Question
dig skillgate.com. NS
Answer
skillgate.com. 5 NS ns2.kloudns.co.uk.
skillgate.com. 5 NS ns4.kloudns.co.uk.
skillgate.com. 5 NS ns1.kloudns.co.uk.
skillgate.com. 5 NS ns3.kloudns.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0