Using the canal and river towpaths, trails and so on - cyclists and walkers. Generally the towpaths are/should be useable/passable for both walkers and cyclists however
you can come across sections where the bank has semi-collapsed - this can be a considerable hazard particularly for cyclists. If you see the towpath is overgrown with
high growth both sides this usually indicates a collapse has occurred - expect to find holes and often deep mud.
There is a speed limit which applies to everyone using England's towpaths - that is maximum 4mph - this towpath speed limit includes cyclists who also
need a permit to cycle on some towpaths. Especially apart from London The Thames Path in many areas is not suitable and not meant to be cycled along. Motorised vehicles are not allowed on the towpaths and trails unless they need access and they have to have
Although the canals are generally not very deep they usually contain a thick layer of mud and also have quite a lot of weed - obviously quite hazardous for young children in particular should they decide to fall in. Perhaps just as potentially hazardous are the canal locks - they have quite deep drops when empty or of course contain many feet of water when filled - most locks do not have guard rails or similar so care should be taken. Rivers of course have their own hazards - strong currents, mud, lots of weed - care must be taken.