Yes the website was back earlier. However many ISPs had of course cached the non-resolving domain so until they clear their cache you will see the site as down. If you are still having problems you can visit the site via a proxy or add 31.170.106.43 domainview.co.uk to your /etc/hosts file (mac) or /windows/system32/drivers/etc/hosts file on windows. This bypasses your ISP lookup.