One of our customers reported problems accessing Lloyds Bank's corporate payments gateway, having already called Lloyds. Lloyds had told them that there were no problems and to clear cookies, add the site to the ActiveX trusted sites list, etc. Still not working, so must be a problem with the customer's firewall.
The first thing we did was to point a browser at https://payments.corporate.lloydsbank.com/ (on an independent internet connection) and nothing happened - it just sat there waiting. So clearly Lloyds were having some problems.