I seem to remember a web site that was devoted to dmu history, and (if I remember correctly) it had a list of numbers. However, I cannot now find it, suggesting that it has either been closed, or experienced major alterations. I was hoping to find details of hybrid set P872, which was part class 101 and part class 108, being a combination of vehicles 53247 and 53646 - does anyone know the original numbers of these vehicles?