I have not had a problem connecting with CPUK. I notice that there are several posts on CPUK from several weeks ago mentioning that pages are slow to load, but nothing recently. Have you tried a different browser just as an experiment?
I have emptied cache, history, used internet explorer, chrome, and firefox, still no connection. I have now contacted virgin media and they reckon they have a server problem which should be sorted in the next 48 hours. If not, I apparently need a new virgin hub installing. This happened to me last year, and the hub I have got at present was a new one back then! Bloody Virgin media aarrgghhhhh!!!!!
Anyway, the good news is I CAN enter the site using my mobile phone as long as I'm not at home lol.
Growing carnivorous plants is not a matter of life or death...It's far more important.