Apex domains cannot have CNAME records.
Question and response
Question
dig mradamwatts.com. NS
Answer
mradamwatts.com. 5 NS ns-134.awsdns-16.com.
mradamwatts.com. 5 NS ns-287.awsdns-35.com.
mradamwatts.com. 5 NS ns-1624.awsdns-11.co.uk.
mradamwatts.com. 5 NS ns-1815.awsdns-34.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0