There's been a lot of change, but let me start by talking to you about the process.
The process began with papers issued by both the BBC and the government. We produced a paper called “Building Public Value”, which talked about our vision of the future. The government produced a green paper, in which it put out its own view of what the BBC's role should be in public service broadcasting.
There were then meetings around the country with members of the public, and seminars, which again were open to the public but tended to attract people in the media industry and academics rather than the ordinary members of the public who'd attended the round-the-country meetings.
As a result of that process, we then came up with a white paper, which set out the government's views more firmly, and finally the charter and agreement.
Some of the things that changed are pretty fundamental. There was a major review of the way in which we are governed. It was felt that the old system of the BBC governors was not either independent enough of the BBC's executive management or rigorous enough in assessing what the BBC wanted to do in terms of new services.
The governors were replaced by a new unit called the BBC Trust. There are still 12 independent people appointed by government, but they now step back from the day-to-day management of the BBC and have a major role in setting the BBC's purpose remit, which is the way in which they feel we should aim to meet those six purposes I mentioned earlier.
They also set service licences, so every service we offer, every channel, every radio station, has a clear remit as to what it is supposed to be doing, which empowers it but also prescribes it.
We have also established a system of what are called public value tests, where, if we want to make significant changes to one of our services or to start a new service, we now have a rigorous process of assessing the public value of what we intend to do against its market impact, which is independently assessed by Ofcom. That replaced a system in which the Secretary of State gave approval for new services but in which there was a much less rigorous process for the assessment of both public value and market impact.
The public value assessment and test were originally proposals by the BBC, but they were very much in response to concerns from the commercial sector, who felt the approvals process for new services was not sufficiently rigorous. So that's one of the major changes.
I'm afraid if I were to list every change that was made I would intrude too much upon your time. I think those are perhaps the key changes.