When the route is blocked

One thing about canals is that it only takes one boat to come to grief on a cill or lock gates and traffic on that section of canal comes to an immediate and complete stop. 

Or at times, canal infrastructure can fail and require repair or replacement. Perhaps nature inflicts flooding, snow or ice to your passage. 

This can be pretty inconvenient when you are travelling to a timetable.

Here's a couple of sites to help you look for hazards or stoppages that may lie ahead, allowing the opportunity to revise and rearrange your route.

• British Waterways provides this link ...

• And this link can be handy too ...