I am increasingly concerned / distressed / irritated by fools with
headphones on who meander along shared use cycle paths, whom upon
approaching, I sound the courtesy bells several times, and yet the
pedestrians do not acknowledge one's approach.

If one is proceeding along the green cycle lane, as designated, at
reasonable speed, sounds several courtesy warning bells, displays lighting,
reflective jackets, and white cycle helmets, what is the legal position
should the pedestrian suddenly veer from the pedestrian section into the
path of the cyclist without looking/shoulder checking/life-saver-ing?

Can the cyclist sue the pedestrian? Could the pedestrian sue the cyclist.

In my quasi-legal opinion, a cyclist exercising all the above cautions and
courtesies versus a yob who chooses to listen to his personal audio system
or jabber inanely on his PAYG phone and chooses not to look could just about
avoid a manslaughter charge, but I am quite worried what my 35 Kilos of Bike
plus 84 Kilos of me plus 10 Kilos of luggage at 20KPH would inflict on an
errant mutt-brained pedestrian.