The BBC is part of the glue which binds the United Kingdom together. At those times of national moment - of joy or sadness, in the UK or around the world, at times when the nation wants to celebrate, mourn or just enjoy itself people turn to the BBC.

The BBC provides the commentary on our lives, the soundtrack of the nation. It is one of the most powerful unifying forces in the United Kingdom today.

Without the BBC, the proliferation of television and radio channels by the private sector would simply result in more and more channels, with tiny audiences, all seeking to do the same thing. The future would be one of fragmentation - fragmentation without either plurality or diversity.

Normally I would not recommend a book that tells you how to make money in the stock market. Most of these books are aimed at gullible folk, and they usually make much more money for their authors than they do for the investing public.

It was an interesting question as to whether the BBC had a future in the digital world, and what form of market failure could justify the licence fee system.

As long as the appointment process is transparent and there is a broad mix of political views among the governors of the BBC, I think the public can feel confident that impartiality and independence are just as important to me as they have been to previous incumbents.

There is an honourable tradition in British public life that those charged with authority at the top of an organisation should accept responsibility for what happens in that organisation. I am therefore writing to the prime minister today to tender my resignation as chairman of the BBC.