This video can not be played
Video has captured a glimpse of what it is like to operate a century-old swing bridge, as it prepares to carry a passenger train over a river.
The Somerleyton Swing Bridge, over the River Waveney on the Norfolk-Suffolk border, was built in 1905.
The crossing carries the double-tracked Norwich to Lowestoft railway line.
A heritage group said it had been “inundated with requests” for tours of the bridge, which are to be held on Saturday and on 16 September.