Britain is forfeiting its position on the world stage. With no national debate, we are surrendering our claim to be a major player in international affairs and undermining the Atlantic alliance that has kept Britain and Europe secure for 65 years. In these circumstances, it is easy to understand why Barack Obama has felt obliged to warn David Cameron of the damage he would be doing to the special relationship and to Nato if he failed to commit Britain to spending the bare minimum on defence.