Nick Wilding: Seven centuries of recorded floods in the Calder Valley.
Why are they getting worse? What can we learn from history? Has the Environment Agency learnt anything from history?
Using evidence stretching back to the 14th Century, Nick Wilding compares the 2015 Boxing Day floods and other recent inundations to accounts of floods from previous centuries.
For more information, visit Hebden Bridge Local History Society
This talk is being repeated due to the heavy snow in February