When sharing, for instance this post: http://www.birddartmouth.co.uk/candlelit-dartmouth-friday-saturday-festive-weekend-look-forward-welcoming/, Facebook doesn't seem to recognise the correct image.
In the header, I have this:
<meta property="og:image" content="http://www.birddartmouth.co.uk/wp-content/themes/html5blank-master/img/logo.png">
But that thumnail doesn't show up when sharing.
Does anyone know how to get Facebook to recognise the correct image?
You can force a Facebook cache refresh with this tool: https://developers.facebook.com/tools/debug/
Enter the URL for your site and click 'debug'. This will force a re-scrape.