Hi Rikard – thanks for your reply!
The website is more than a year old already.
However, I think we might have found the solution. Or the problem rather. When manually doing a Google search “site:herpesfree.co.uk”, the cached example came up blank. The same thing happened when nerding it a bit more on Search Console, see screenshot http://prntscr.com/uvv76u. Robot.txt is blocking Googlebot, but this is only the Google Ads bot. Google should still be able to crawl the website.
I have three programmers working on a solution. If they can’t come up with anything, we will have to nuke the domain and rebuild everything from scratch.
Nobody understands how this could happen. We have numerous other domains – with the exact same build. The .co.uk domain is actually the last produced website. Everything is copied from another domain ie. Herpesfree.de – except for the content. All content is unique.
Google works in mysterious ways :)