Thanks. I agree, I couldn't see anything wrong date-wise, though I don't think the issue started as long ago as 13th Jan. I was pretty sure it wasn't "a site pretending to be web.orange.co.uk&quo ...
For a couple of weeks now, when I go to log-in to fsmail webmail at https://web.orange.co.uk/r/login/ (browser SeaMonkey) I have been getting this warning: -