http://www.sidetrackedseries.info
Dullingham is a remote passing loop on the otherwise single track between Cambridge and Chippenham Junction. There is a signal box and manually operated crossing gates. Although at casual inspection the station looks like a standard double-track station the train operation is somewhat different. The main line passes the platform closer to the village (platform 2); all Westbound services use this platform, but the main-line is signalled bi-directionally and unless trains are required to cross at Dullingham Eastbound services typically use this line too
There is plenty of parking nearby.