In reply to Andy Ovens - UKC and UKH:
Hi Andy, thanks for your patients. To be honest I can get them on my other computer and my phone so if this is too much hassle it may be worth blaming the "gremlins" and moving on!
I disabled all my extensions, including my ad-blocker.. I only had that one and an adobe PDF thing. Still no luck though. On a little side note, the photo isn't replaced by the little broken-link icon, its as if there was never a photograph in the first place.