There were two issues, the first being a false positive after my local Firefox updated, and it turned out AdBlocker Ultimate was blocking a number of our cached files. I would suggest (given we don't actually serve any adds!) that you add an exception for mastodonapp.uk and it's subdomains if you have an add-blocker.
Our second issue was the Elasticsearch container running on one of our VM's did not auto start, despite the container auto starting. We are looking to fix this for the long term!
