Sorry I hadn't replied, forgot to check back on the thread. Glad you got it working anyway.
As I remember I just used the default SSL ports set by my mail client when I switched SSL on. Thinking about it I don't think that I found anything at the time on the UK Servers help site about using IMAP or SSL, I just tried it to see if it worked and it did.
Just looked again and have found http://www.virtualnames.co.uk/faq.php?id=MAILSERVERS,
I searched the help site for IMAP and found it, it is under the Email > General Questions section of the helppages. It shows the server names and ports, though it does say that while SSL will work, they do not directly support it. I have never had any problems using it.