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Finally sussed ! :)
Not keyboard, not maintenance ... turned out was IE. I use that as my default but after the guy at Barclaycard getting narked 'cos he couldn't see my failed attempts & admitted he didn't have a clue but had asked me to delete history & cookies anyway, asked if I had another browser. Well I use Google Chrome for Facebook so tried it from there - was fine ! Then tried to login to the bank - that was fine too !! Seems more & more sites are becoming incompatible with IE ...
But thanks for all your suggestions, appreciated :)