My Lords, the air defences were spectacularly successful and, for once, they rebutted that old air power adage, “The bomber will always get through”. However, will His Majesty’s Government heed the stark lesson for the air defences of the United Kingdom? Many weapons might be fired overnight by an aggressor, from land or sea, at the United Kingdom. What steps have the Government taken to protect London and the rest of the United Kingdom, to deter any serious attack, to retain our own air supremacy, and, indeed, to avoid facing defeat in a second Battle of Britain?