Apex domains cannot have CNAME records.
Question and response
Question
dig placeceo.org.uk. NS
Answer
placeceo.org.uk. 3 NS ns-643.awsdns-16.net.
placeceo.org.uk. 3 NS ns-925.awsdns-51.net.
placeceo.org.uk. 3 NS ns-249.awsdns-31.com.
placeceo.org.uk. 3 NS ns-738.awsdns-28.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0