As I said I'm not convinced that anything is sorted, been out doing some stuff around the house, came in and looked at stuff online, an aviation forum I look at did load eventually, previously had to close the page and open a new tab to load. This forum was quick (had been very slow or failed to load at times).
For most sites I do not see the problem, only some. This issue started for me only recently.
This is what I got earlier today - Our team have confirmed the problem has been rectified. Please monitor it over the next 48 hours and if the problem persists, let me know.
My background is electronics, radio, networks, systems and the like. Well used to being fobbed off by suppliers/carriers.
I appreciate this thread is about the 535 but I'm seeing the issue with a 525. My 535 is at another property and had not seen anything amiss last time I used it which was before lock down.