To continue on the problem you have, could we, based on past experience, insert numbers—let's say 10% more than what we would anticipate—to get under way? Would it be possible to correct it later if it should prove to be incorrect? If we find when we start that it's going to be more costly, we would go back. At least that way we could have things started and some of it put into place. If we find we've reached that level of cost, then we would have to get a second motion.
I don't know if that's appropriate. I've not done it before, but the idea is to get this under way. It would be good to get staff started on some of the work.