No, I don't know if there was enough space but I was speaking generally; I expect cyclists to slow down, or even stop, if there isn't enough space to safely pass. In the same way you should give way to cyclists when driving a car, the bigger, heavier, faster machine should yield to the more...
Even if it wasn't a shared path, it's a £30 fine, not the death penalty.
On a shared path I would expect cyclists to slow down or stop if there's not enough space to safely pass.