Here are a few links to other highly recommended railway related sites.

wnxx.com - Covering data on all stored / withdrawn and scrapped locos

1980's timewarp - Covering loco hauled trains in the 1980's

Martin Bray - Photo site with nearly EVERY class 31

Derek Gordon - Another fotopic site with several good class 31 pics

Preserved Diesels - Everything you ever wanted to know about preserved diesels and lines

Hellfire! - The best bashing sim on the planet (and only £25!)

31400 - my sister site dedicated to the history of 31400

A1A Locos - The Premier Class 31 preservation group

Number Panels - Whole host of number panels from all classes, especially class 31's