In reply to mcdweeb:
Polite ping on approach.
Second polite ping a bit closer.
Then either an "Excuse me, can I come past?" Or a "coming past on your right/left", if it's clear.
All the time slowing, in case they do something dumb.
Pedestrians have as much right as cyclists to be on shared paths. Yeah, it's frustrating when I lose all my speed at the foot of a limb, but it's all good practice.
What does bug me a little is when a group of folk (walkers / dogs / horses / bikes) split to both sides and leave a narrow gap, instead of all moving together to the inside.