The shed contains one of the largest and most complex standard gauge 0 model railway layouts in the UK.
30 trains run simultaneously through 16 stations. Controlled from a central control room it is wired on the automatic block system. Built by one man over a period of 20 years. It incorporates a fully operational fairground.
Video's inside the shed can be seen on YouTube site enter Dream City Railway into the search box. There are more photographs under Shed build here.