I am listening with great interest to my right hon. Friend and I recognise what he is saying about that issue. There is another feature, which is often not well reported; I think Keegan brought it out in his book on the first world war. The fact that communications had not advanced at the speed with which munitions had, meant that often news of what was actually happening on the front took nearly half a day to arrive back at divisional headquarters, so nothing could be changed. It is a really important issue. We tend to condemn the commanders, but we forget sometimes that they had no idea, quite often, what was happening for hours, let alone minutes.