Apex domains cannot have CNAME records.
Question and response
Question
dig dekkertimber.com. NS
Answer
dekkertimber.com. 1 NS ns-273.awsdns-34.com.
dekkertimber.com. 1 NS ns-1700.awsdns-20.co.uk.
dekkertimber.com. 1 NS ns-1921.awsdns-48.co.uk.
dekkertimber.com. 1 NS ns-232.awsdns-29.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0