Even with the recommended code added, page load is still a bit slow. I understand the widget is dynamically loading reviews from various sources but when a new user clicks on that page, there is an expected response time based on the user’s experience with other pages on the site. The widget load time exceeds that expectation and people think there’s something wrong and start to click out. Consider creating a “loading” message or icon and serve it up immediately so people understand that it’s working rather than non responsive.
Hi there, @Stuart_Bremner and welcome aboard 
I’ve checked your website and haven’t noticed loading issues there. If you’re still experiencing this issue, please try to move the first line of the widget installation code to the website <head> as high as possible.
Here’s what the first line of the code looks like:
<script src="https://static.elfsight.com/platform/platform.js" async></script>
As for the second line of the code, it may remain untouched where it is added now. Please try it out and let me know if it helped.
In case the issue still persists, please send me a video screencast showing the loading issue 