I found this bone which I think belonged to a Muntjac deer.
Using a piece of flint I scored around the ends
to remove them both
Then I made wooden tips from Ash and Hazel for making fire by friction
My flint knapping skills are not good unfortunately but I can do most of the things I need to with the right flake.
One end of the flake in the video below I used as a scraper to shape the wooden plugs to fit into the ends of the bone and the sharpe edge of the flake I used to cut throught the wood.