Brent Council's Lack of Grit

From correspondence with Council officers, I understand that there is a real danger that Brent is going to run out of street grit. I have been told that grit stocks are "at a very low level" and that "other areas of the UK have a very strong claim on whatever stock is available." Most worryingly, I am being told that "We may even need to limit our priority routes still further if the weather deteriorates." I take it that means that even some of the "priority" roads may cease to be gritted if the snow and ice persist.