The incident on a stretch of the Llangollen Canal in Whitchurch has been blamed by engineers on an “embankment failure”, with its collapse causing water to rush into a nearby field - and the canal bottom to fall away, leaving a trench.
Two narrowboats were said to have sunk into the hole shortly after 04:00 GMT, with one witness estimating it to be 15ft (four metres) deep.
Scary stuff…