It is, of course, a sticky question. When most people seem to agree that there's only one superpower left standing why should the UK government spend £25 billion on a replacement for Trident?
That's quite a lot of money, even if it were to come in on budget. Considering that there are 60 million people in the countries of the UK that comes to over £400 a head. More than enough for everyone to buy an Apple Mac Mini. Macs not bombs, I say.
But hang on a millisecond. That rough calculation assumes that Gordon is using the US definition of a billion (a thousand million). If he were using the traditional 'British' definition (a million million) that would mean a million pounds to most households (give or take).
That would be unthinkable, wouldn't it?