For many centuries the main route from Cambridge to Ely was via the Aldreth causeway.
The bridge at the causeway collapsed into the river in September 1765, probably weakened by floods.
An alternative route the Twentypence Road between Wilburton and Cottenham, was opened in 1931.
For further information about the Fens and drainage see CAS 2024 Proceedings paper ‘Fen crisis: how the Age of the Windmill’ ended.’
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