Dividend history
| Dividend | Ex-dividend date | Payment date | Amount (pence) |
| 2011 Interim | 02/11/2011 | 02/12/2011 | 2.70 |
| 2010 Final | 04/05/2011 | 03/06/2011 | 4.20 |
| 2010 Interim | 03/11/2010 | 03/12/2010 | 2.10 |
| 2009 Final | 05/05/2010 | 04/06/2010 | 2.53 |
| 2009 Interim | 02/12/2009 | 08/01/2010 | 3.47 |
| 2008 Final | 03/06/2009 | 06/07/2009 | 6.84 |
| 2008 Interim | 08/10/2008 | 07/11/2008 | 3.47 |
| 2007 Final | 30/04/2008 | 06/06/2008 | 6.84 |
| 2007 Special | 11/06/2007 | 22/06/2007 | 43.37 |
| 2007 Interim | 03/10/2007 | 02/11/2007 | 3.14 |
| 2006 Final | 23/05/2007 | 22/06/2007 | 6.03 |
| 2006 Interim | 20/09/2006 | 03/11/2006 | 2.91 |
| 2005 Final | 03/05/2006 | 02/06/2006 | 5.60 |
| 2005 Interim | 02/11/2005 | 02/12/2005 | 2.70 |
| 2004 Final | 04/05/2005 | 03/06/2005 | 5.25 |
| 2004 Interim | 03/11/2004 | 3/12/2004 | 2.73 |
| 2003 Final | 05/05/2004 | 04/06/2004 | 4.86 |
| 2003 Interim | 05/12/2003 | 05/11/2003 | 2.60 |
The 2009 interim and earlier dividends have been adjusted to reflect the bonus element of the Rights Issue in 2009.