Thanks Nigel, that seems to have made a difference. No options were selected on that page, and reading the FAQ it looks like this would have been the setting it was defaulting too so I’m not sure why saving the setting has made a difference to load times, but it’s definitely working better. I’ll report back if there are any further problems.
Thanks for your prompt reply!
My personal kiwitrees installation - http://familytree.derekjwhitten.id.au