The closest point with easy access was the bridge at Flax Bourton which overlooked the long closed MOD siding.
Note:- Tyntesfield Government Sidings - Flax Bourton. Were just west of Flax Bourton station. They were closed in 1981 Quite extensive sidings existed here - which ran for approximately 1,000 yards north east - a good view of these can be obtained by reference to Google Earth and by turning the clock back to 1999. Google Ref 51deg 25' 34, N 2 deg 42' 51 E