Thankfully, I had put some charred horse shoe fungus in the tinder nest, which, although the fire had died, was still burning away. I added some more horse shoe fungus and built up a really good ember, then used some birch bark and a feather stick to get a flame going again.
With the fire established, I used a tripod I’d made with dead standing willow and birch branches, bound together with a bracket stem. I suspended a pot of water from a pot hanger attached to the tripod and boiled up some water for a brew.
Happily the bow drill set worked a treat, but I learnt that I should have prepared my tinder a bit better. I’ve found that purple moor grass and bracken need some extra tinder to sustain and prolong the flame; for example with birch bark or a feather stick.
Need to keep practising.