Marks Tey is the junction between the Great Eastern Main Line between Norwich and London and the branch to Sudbury. As I was catching a train myself, I didn't get much of a chance to explore.
Platform 1:
The ticket office and bridge on platform 1:
The building on platform 3, where branch line trains depart:
All photographs are © Alexandra Lanes You may reproduce them anywhere for any purpose. Coastline maps are reproduced from Ordnance Survey map data by permission of the Ordnance Survey © Crown copyright 2001