Reedham Swing Bridge
Reedham Swing Bridge carries the Wherry railway line, between Norwich and Lowestoft, across the River Yare near Reedham railway station.
The original single track bridge was commissioned by Sir Samuel Morton Peto in the 1840s. The present bridge dates from 1902–3.
See Wikipedia entry.
Network Rail photo here.
Somerleyton Swing Bridge, crossing the River Waveney, is of similar design.