Thanks for the responses. Apologies for the upcoming newbie questions:
Looking at that URL, it looks to me as if you are loading a cached stylesheet. Try first clearing the cache (I think it’s the Autoptimize plugin), see if that works.
Could you direct me as to where I would clear this cache? Is it accessed via cPanel?
ideally you’ll have to ensure the page is always loaded over HTTPS to avoid HTTP-pages (with http-resources) get cached and used on HTTPS-pages.
Could you help elaborate as to how I would achieve this please?
Cheers
Ben