Ms Claire Quane:

We know where all of the gas is, we know the equipment that is filled with the gas and we are always trying to improve the inventory. If we have old equipment, for example, we may not have originally got the total volume of SF6 gas from the supplier. The requisite information may not be readily available for that old equipment but we do have an estimate of the SF6 gas contained within that equipment. The newer equipment is in compliance with the new regulations so that would be very clear. We are constantly evolving and that is when I go back to the fact that we are dealing with and managing legacy equipment. That is what we do.