Recall of MPs Bill

My Lords, I do not intend to go through all the arguments as I have dealt with them on previous amendments and they have been dealt with eloquently by my noble friend Lord Howarth and particularly by the noble Lord, Lord Hamilton, who did a splendid job in moving the amendment. I am not sure which Minister is going to reply. It will be good if it is the noble Lord, Lord Gardiner, as we might get a straight answer. Perhaps, in his reply, the Minister could say why it is 10%. That is all I want to know. Why is it not 5% or 20%? My amendment has it as 20% because I do not want to make it too easy to unseat Members of Parliament, but it could be any figure. Why did the Government alight on 10%?