As my right hon. Friend is aware from the early negotiations that we held on this particular issue, the £39 billion has been determined in relation to our legal obligations. I think it is important that as a country we stand up to our legal obligations. As my right hon. Friend will also know, there is a timetable for these payments spread over a period of time. A key element is ensuring that we are able to have that implementation period, which is so important for our businesses, so that they have only to make one set of changes and that there is a smooth and orderly withdrawal.