(19)

(11)

EP 1 644 933 A2

(12)

(88) Date of publication A3: 31.03.2005 (43) Date of publication: 12.04.2006 Bulletin 2006/15 (21) Application number: 04743245.5 (22) Date of filing: 05.07.2004

(51) International Patent Classification (IPC):  G11B 27/10(1968.09) (86) International application number: PCT/GB2004/002900 (87) International publication number: WO 2005/004364 (13.01.2005 Gazette 2005/02)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR (30) Priority: 03.07.2003 GB 0315589 02.12.2003 US 727069 (71) Applicant: ZOOTECH LIMITED Sheffield S1 4QT (GB)	(72) Inventors: GREEN, Stuart, Antony Sheffied S7 2HF (GB) REID, John, Kendall 0 181 Pretoria (ZA) (74) Representative: Lawman, Matthew John Mitchell et al EIP Fairfax House 15 Fulwood Place London, WC1V 6HU London, WC1V 6HU (GB)