We had sort of local spey fishing festival in the North of Poland: river Drweca (rather small, but deep, sea trout and atlantic salmon river) .
Members of that informal "club" are Polish fly fishermen who use double hand, switch rods and SH rods with Skagit/Scandi lines.
Spey casting is still kind of "exotic" thing in Poland, because we don't have traditions in it, and only 1 or 2 certified instructors exist per whole country.
With this particular river, I found Skagit is the best tool (either on DH or SH rod). River is lined by forests and bushes, bank access often hard, and not so much place for wading, so it's often described as "casting with the wall behind".
Demo of snap-c, snap-t and perry poke with 6wt SH rod (Ego Glass 8'6" 6wt and Ego Tactical Skagit 260)
p.s I'm not good caster , I wish I'd do that in more elegant way