Ally's Yellow is my favourite variant of Ally Gowans' famous shrimp pattern and I use it regularly on the Tummel. This picture is from last year's batch.
The tag and rib are oval gold tinsel, the tail is yellow bucktail with gold Krystal flash, the underwing is yellow dyed fox squirrel tail. The overwing is Lady Amherst Pheasant tippet dyed yellow. The collar is a yellow hackle from a Whiting 4B Hen Cape and the head is a UTC 70 fluorescent yellow thread.