| Year | Dividend | Rate (US cents per share) | Rate (Pence per share) | Ex Dividend | Record Date | Pay date |
|---|---|---|---|---|---|---|
| 2005 | Interim | 5.50 | 17 Dec 04 | 17 Dec 04 | 14 Jan 05 | |
| Final | 11.55 | 20 Jul 05 | 22 Jul 05 | 19 Aug 05 | ||
| 2006 | Interim | 5.70 | 14 Dec 05 | 16 Dec 05 | 13 Jan 06 | |
| Final | 14.30 | 19 Jul 06 | 17 Jul 06 | 17 Aug 06 | ||
| 2007 | Interim | 15.00 | 7.89 | 06 Dec 06 | 08 Dec 06 | 11 Jan 07 |
| Final | 20.00 | 10.08 | 11 Jul 07 | 13 Jul 07 | 16 Aug 07 | |
| 2008 | Interim | 16.50 | 7.95 | 05 Dec 07 | 07 Dec 07 | 17 Jan 08 |
| Final | 25.00 | 12.81 | 09 Jul 08 | 11 Jul 08 | 14 Aug 08 | |
| 2009 | Interim | 16.50 | 10.28 | 03 Dec 08 | 05 Dec 08 | 14 Jan 09 |
| Final | 25.00 | 16.70 | 08 July 09 | 10 July 09 | 05 Aug 09 | |
| 2010 | Interim | 17.50 | 10.62 | 09 Dec 09 | 11 Dec 09 | 07 Jan 10 |
| Final | 27.50 | 18.08 | 07 Jul 10 | 09 Jul 10 | 04 Aug 10 | |
| 2011 | Interim | 20.00 | 12.39 | 08 Dec 10 | 10 Dec 10 | 06 Jan 11 |
| Final | 32.50 | 19.64 | 06 Jul 11 | 08 Jul 11 | 03 Aug 11 | |
| 2012 | Interim | 20.00 | 12.49 | 16 Nov 11 | 18 Nov 11 | 15 Dec 11 |
| Final | 35.00 | 21.77 | 15 Aug 12 | 17 Aug 12 | 05 Sep 12 | |
| 2013 | Interim | 21.00 | 13.09 | 21 Nov 12 | 23 Nov 12 | 19 Dec 12 |
