TBH hybrid caddis spider
This is my favourite hybrid of a spider fly and a bead head nymph with a tungsten bead up front. I carry this fly in two sizes and find them particularly useful in situations where I need a bit of weight to get a fly down yet still want the anchor fly to fish well and be enticing to trout rather than just being an anchor for other flies in the team. This is a great buggy looking fly and the tail and soft hackle provide plenty of movement.