The South Downs Double site has been rather static recently and I know some work may be going on to bring it into this decade.
Last year there were a few attempts on the Double, one or two were successful with Russ Adams getting very close to Josh Ibbett's time, and several others who may try again later.
More information about riding the Double can be found on
http://richardsterry.blogspot.co.uk/201 ... ouble.html
or you can even go for the Triple (suggest you try the Double first).
If you are thinking of joining the Hall of Fame, feel free to drop me a line if you want any more information.