This is a very good book for reference when I want to check model train items that come up on Ebay. Great to know when the item was manufactured etc. Only negative point is that I should have checked and bought a more recent version edition. This is the 5th and I know they are up to the 7th. The 5th ends at 2006 but that's a minor inconvenience. If you're into collecting British model trains this is essential.