Following a visit to Taipei by U.S. House Speaker Nancy Pelosi, China's ambassador to the UK warned other countries not to follow the U.S.'s lead by undermining the One China policy that almost every country in the world has agreed.

Below is the text of a communique agreed between The People's Republic of China and the UK when the two sides commenced full diplomatic relations 50 years ago:

COMMUNIQUE ON THE AGREEMENT BETWEEN THE GOVERNMENT OF THE PEOPLE'S REPUBLIC OF CHINA AND THE GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND ON AN EXCHANGE OF AMBASSADORS.

Both confirming the principles of mutual respect for sovereignty and territorial integrity, non-interference in each other's internal affairs and equality and mutual benefit, the Government of the People's Republic of China and the Government of the United Kingdom have decided to raise the level of their respective Diplomatic Representatives in each other's capitals from Chargeé d'Affaires to Ambassadors as from 13th March, 1972.

The Government of the United Kingdom, acknowledging the position of the Chinese Government that Taiwan is a province of the People's Republic of China, have decided to remove their official representation in Taiwan on 13th March, 1972

The Government of the United Kingdom recognise the Government of the People's Republic of China as the sole legal Government of China.

The Government of the People's Republic of China appreciates the above stand of the Government of the United Kingdom.

It is available, together with an accompanying statement to the UK parliament here.