shell:$ nslookup -timeout=2 -retry=1 'poll.hee.nhs.uk'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
poll.hee.nhs.uk	canonical name = cname-490.smartns.co.uk.
cname-490.smartns.co.uk	canonical name = customdomain.smartsurvey.co.uk.
customdomain.smartsurvey.co.uk	canonical name = proxy.fallback.smartsurvey.com.
Name:	proxy.fallback.smartsurvey.com
Address: 104.17.189.36
Name:	proxy.fallback.smartsurvey.com
Address: 104.17.190.36
Name:	proxy.fallback.smartsurvey.com
Address: 2606:4700::6811:bd24
Name:	proxy.fallback.smartsurvey.com
Address: 2606:4700::6811:be24