i came across a forum which seems to concentrate on LDN, and is UK based. makes interesting reading. many of the members seem to be MS sufferers, but there are also members with Crohns on there, and some very helpful info.
here is the link..
http://www.ldnresearchtrust.org/forums/index.php?act=idx
here is the link..
http://www.ldnresearchtrust.org/forums/index.php?act=idx