Clam1952 is correct - there is not much British ng stuff on the DLS.
If you use "2ft", "600mm" or "610mm" or variations of as search parameters you will find some more stuff which might be usable.
I have downloaded Kevins stuff off the Trainzone site and installed it (in TRS2009) without problems. In 2009 some of the assests do show errors but they are fixable.
Chris