I have some of that somewhere, an Aunt 'O mine sent it to me.
Due to the shorter distance (me - Redoubt V/S her - St Hellens) there is a significantly larger proportion of the ash we got that is gritty (about the consistency of beach sand) as oposed to the mostly talc like ash she sent me (our has that too, and I understand that if you were closer to St Hellens there was plenty of the bigger grit there too).
