Used to fancy it when I was crossing in the mid-90s & during brief return (2007 - 2010), but really fancy the Fell Race now
Trouble is; anyone can get a 3P CX place, if they're (un)lucky enough to get an entry,
but, the 3P FR requires provable race qualifications
You have had to have finished certain Catagory (distance/severity) races to be considered, in the (I think) 18 months prior to attempting to enter
http://www.threepeaksrace.org.uk/raceinfo2013.html
Scroll down to 'Entries'/'Qualifications'
I had one 18 miler in the bag, but it was getting to other races to get another qualifier
Maybe, before I'm 50??