The problem I’m having is that image loading times are often absurdly slow. Upwards of ten seconds for 100-200KB images. The response times are so slow that which image is displayed often gets out of sync with what’s actually on the rest of the page.
On other servers the load times are essentially instant.
This looks like a DNS configuration issue to me- you’re configured to use Netlify DNS hosting, but you’re not actually using it… and you have an A record from your true DNS host pointing to 126.96.36.199, which is our load balancer on the US West coast. With this setup, requests from the UK that have to travel all that way will in fact be super slow!