The Great Western Railway was created by an Act of Parliament in 1835 which authorised construction of a railway linking Bristol with London. 2010 therefore sees the railway's 175th anniversary.The line was designed and engineered by Isambard Kingdom Brunel to be the finest in the land, and was completed in 1841. Since 1967 Didcot, the half way point of the route, has been home to the Great Western Society who have recreated a living museum upholding the traditions of the Great Western Railway based around the original engine shed, coal stage and depot. On steam days the whole centre comes to life and whereas many preserved railways' steam sheds are `out of bounds' to the general public the buildings at Didcot are the focal point.For many years the centre's events calendar included `Photographers' Evenings' that aimed to recreate some of the activities which were once common in a steam locomotive depot at night but rarely seen.The programme of events provided a variety of opportunities for photography with static scenes alongside locomotives in steam being repositioned around the site throughout the evening. In this unique album photographer Mike Heath presents a collection of more than 140 images from his stunning portfolio of atmospheric night time scenes taken over a number of years at these events and depicting the real steam atmosphere generated by the only surviving original Great Western engine shed at work.