Thanks. I recently had a "problem" with a well known website, not this website, when the site suddenly became unusable and is, perhaps, best described as "being all over the shop" which was highly inconvenient. After 2 days of head scratching and multiple internet searches I discovered that "unchecking" the safeguarding blockers on my broadband resolved the problem and that is why I suggested it here as a possible solution.
What I don't know is if the "blockers" were the root cause of the problem or if "unchecking" them is just a work-round solution for an underlining problem. Why the problem arose with the website in question, all of a sudden and without warning, I've no idea. Perhaps it was subjected to an "upgrade" and we've all, probably, had experiences of I.T. "upgrades"!