See how your comment has inbuilt sass? It doesn’t matter what you consider plenty of space and an appropriate speed- if you startle me, I’m going to yell at you for not ringing a bell to let me know you were there.

Note that the worst kind of canal towpath cyclist is the one who slows to a crawl and creeps behind me for minutes sometimes unnoticed, biding their time for a passing spot with lots of space. Just ring the frigging bell and I will stand out of your way for the 3 seconds it takes you to get by!