Water and watercourses – Canal. The claimant's boat had been validly removed from the River Trent by the defendant Canal and River Trust (CRT), and the CRT had been entitled to place it in storage and require the claimant to pay sums for its return. Among other things, the words 'main navigable channel' would be construed widely, as suggested by the CRT. Consequently, 'main navigable channel' was not confined to the deepest part of any river, canal or navigation which was used from time to time as a thoroughfare or fairway.