Work has begun to protect more than a thousand homes and businesses in Morpeth in Northumberland, four years after flooding devastated the town.
A number of young oak trees have been removed from the riverside to make way for protective walls.
The work is expected to take until early next year and has been welcomed by residents who think that the work is long overdue.
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The children on board were from Easingwold School and were travelling along roads affected by heavy rain and flooding after Christmas.
The walls had been closed to the public at the weekend amid fears of a collapse.