A few steps to help avoid the redirection while the site admins fix this:
1.) Don't use a search engine to locate the site - make yourself a bookmark/favourite (Firefox and Chrome - press the CTRL and D keys on the keyboard while you're on the site or click the star icon at the end of the address bar. Always use the bookmark to access the site and never links from another website (e.g. Facebook, Twitter, search engines)
2.) Allow the site to set it's normal cookies, this doesn't mean you have to store your username and or password for the site, just don't delete the BCUK cookies when your browser closes. If you're concerned about privacy issues and normally delete or disallow cookies there are ways to add exceptions on a site by site basis to, temporarily if you like, allow them for BCUK.
3.) This should go without saying, but just in case. If you are redirected, DON'T CLICK ANY LINKS OR ACCEPT ANY DOWNLOADS from the redirected site. Your best bet is to immediately close the web browser without using the mouse - this is very easy, press and hold the ALT key on the keyboard and press the F4 key once. You may need to repeat this if there is more than one window open.
4.) Unless you're asked not to, keep reporting the issue to the mods/admins in this thread as it happens. They may not be aware that any fixes they have tried have not worked and reporting it will help them build up a pattern of behaviour of the exploit/redirection.
Hope that helps someone.