Thomson Reuters had a tough day on its entrance to the London stock market. The company came into being when Canadian firm Thomson bought Reuters for £8.7 billion.

Shares in Thomson Reuters fell on Thursday by 14.5 per cent to 1560 pence per share in London. Toronto listed shares in the company also fell 4.9 per cent to 35.96 Canadian dollars.

Thomson makes publications dealing with law, tax and scientific research. Analysts fear that demand for their services will fall as the financial services industry contracts in the face of the credit crunch.