Had Logged out, just gone back to it to check and got this message
*Sorry
We're aware of intermittent problems logging in to BTYahoo webmail, sorry if you're affected. We're working to fix it as soon as possible*
So looks like there is a problem
Yes hellywelly4 I am - can open my email page but can't open any emails or get into any folders. Am using Firefox but if I use Google Chrome all is well which suggests a firefox problem rather than yahoo but I'm a thicko with anything technical.