http://www.mjwsjw.co.uk/useful_information.html
Quote from their website:
The product range developed by E.B. Models, and the content of this website would not have been possible without the specialist knowledge shared freely by members of the Brighton Circle. This was formed in 1974 for the furtherance and publication of research into the history of the London Brighton and South Coast Railway. If you would like to become a member, please contact the Secretary