One of the questions we get asked a lot is where do I sew on my badges (well actually where do I sew on my beaver/cub/scouts badge ! ) – The Scout Association UK has published an app called My Badges (currently £1.49) – https://itunes.apple.com/gb/app/my-badges-scout-association/id429387936?mt=8
You may also find the downloadable guides below of use.