With your BA Q Alex, I would suggest the Brigade had the spot due to being below min SFEC so it is usual for Brigades to fill the spot with one of their own if the nominated person cannot attend. I know I did this back in my BTC and GTC days with all courses. The Regions don't mind as long as if the Brigade can't fill it themselves that they let STC know ASAP so there is not a mad scramble to fill the spot just days out. I know the last BA course ran full but there were 10 changes of nominations in the week leading upto it, which meant a lot of work by staff and vollies to make sure it did run full.