Apex domains cannot have CNAME records.
Question and response
Question
dig sbrownphoto.com. NS
Answer
sbrownphoto.com. 5 NS ns-1976.awsdns-55.co.uk.
sbrownphoto.com. 5 NS ns-1741.awsdns-25.co.uk.
sbrownphoto.com. 5 NS ns-1614.awsdns-09.co.uk.
sbrownphoto.com. 5 NS ns-1769.awsdns-29.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0