Web site isn't busy, it's fallen over.......again!
If it was busy, you would either wait or time out the request. The error messages are looking like the server has crashed and is not allowing external access.
I could get onthe Home Page this afternoon, but not any other 'pages' and now I can't get on at all. I've tried using Mozilla Firefox instead of Internet Explorer as that worked in the past, but that doesn't work either.
That's the trouble with these steam driven websites - in cold weather the coal runs out and they go down!