Lee, I use a variety of rigs - up and over, Portsmouth loop, but if limited to just one it would be a 2 hook clipped down with size 1 or 2 hooks. I favour fairly long snoods (45-50cm), but don’t usually bother with beads, as I have caught equally well both with and without them. Bob.
I generally use a wishbone dropper rig which I make myself. Size 1 or 2 hooks. Orange, red and black beads generally but never experimented with/without beads to determine if they do anything or not to be honest. Blacks tipped with rag seems to be the most reliable bait. Having said that, have also caught plenty on 2 hook clipped down rig as well as on peelers, rag, lug and worm/squid tipped so there’s no hard and fast rules. I try to use leads without grips if tide permits.
Have a mixture up&over dropper wishbone is one that works and was using that plus clipped down paternoster wishbones
Going more with 1/0.2/0 hooks these days as they still stuff there faces with them ok