Hello Ciarán,
This morning I typed in 'Joomla51' to get the search result in Google.
Obviously your site was the first search result :-)
But the link there didn't work properly, I got an empty page.
The URL https://www.joomla51.com/ isn't forwarding to anything.
And therefore the sitelinks at the searchresult also don't work.
Just to let you know :-)
Greetings Ton