This government has made no secret of its strong support for the Commonwealth. But no institution today can be complacent. People rightly want to know why institutions exist and what they achieve. The European Union is familiar with this sort of scrutiny - and in recent times, the UK and others across Europe have been asking how it can become more competitive, more flexible and more democratically accountable. The Commonwealth's challenge is very different. It has to explain to all of us how it can be relevant to us in a 21st century world, a world of competing bodies and organisations covering every area of international activity.