The Breach in the Gloucester Sharpness Canal

A breach in a culvert under the Gloucester to Sharpness canal ocurred in 1990.  The following pages give the story.

Can you fill in any missing details, for example when in 1990 did the beach take place?

Page link: Interview with Tony Ashby.
Interview with Tony Ashby.
The breach of the Gloucester Sharpness canal.
Page link: The Policeman's story
The Policeman's story
The breach in the Gloucester to Sharpness Canal