I live next to an old abandoned football pitch which me and the neighbours have been sneakily turning into a wildflower meadow / birch grove over the last few years. Whenever I need grit, I just go out and dig up a bucket of 'blaze', but it occurred to me the other day that I have no idea what 'blaze' actually is! Does anyone know the origins of the scrapy red granular stuff? And why is it called blaze? Is it because when you fall over on it, it feels like someone has burned off your outer layers of skin??

Bob