After marking the stitch line and stitches,I attached the upper to the runner sole with tape. The bulldog clips do the rest.
What you need for hand stitching is basically a third hand to hold the work side on, so you can see the back and front.
I’m using this funny contraption because since moving house I can’t find my wooden clamp, but the upright of my desk actually provides support along the whole shoe, not just the bit you’re stitching. You can use a door if you don’t have an upright desk. I found the metal clamps in a pound shop.