As I said, I'd already tried with Chrome and IE. Last night I also checked with Firefox and still no luck.
I had also tried Chrome and IE from my workplace with no luck.
Anyway, as of this morning everything seems to be working ok.
Will keep an eye on it and if it goes again, I'll do some more investigations to get as much info as possible and let you know.
Cheers for the quick replies and suggestions.
N