Hi, thanks for replying. I backed up the entire site shortly before updating the backend. At the moment though, I cannot access the backend (it’s just a blank white screen) so I don’t even know how I could restore this if I wanted to.
Sorry if I’m missing something obvious here but although I’ve been tasked with the responsibility of this website I have zero experience of website design/programming. Other WordPress sites I maintain are exclusively ‘blogs (actually mostly managed through the outdated Windows Live Writer).