Things I have tried:
Cleared the cache,
Tried a different browser
Tried a different Computer
Tried a different DNS server.
Tried a linux machine.
Tried a different ISP (Mobile Hotspot)
And I still see http://mailwatch.co.uk going to plesk and http://www.mailwatch.co.uk coming here. I not trying to be a smart arse, just fault finding.
I'm thinking that other people may not be able to find the new site.