| HALL, Rauna ACTIVE | Secretary | 01 Mar 2026 | | | | Central 40, Chineham Park, Basingstoke, Hampshire, RG24 8GU, England |
| GIBSON, Robert David ACTIVE | Director | 01 Apr 2022 | | England | April 1973 | Central 40, Chineham Business Park, Basingstoke, RG24 8GU, England |
| ALBERTSON, Paula RESIGNED | Secretary | 20 Dec 2013 | 15 Jul 2015 | | | 5th, Floor, 6 St. Andrew Street, London, EC4A 3AE, United Kingdom |
| HOOGERS, Willem RESIGNED | Secretary | 15 Jul 2015 | 31 Mar 2016 | | | Third Floor, 1 New Fetter Lane, London, EC4A 1AN, United Kingdom |
| KARST, Peter Johannes RESIGNED | Secretary | 01 Oct 2004 | 20 Dec 2013 | | | Haidfeldweg 1, Bad Durkheim 67098, Rhineland-Pfalz, Germany |
| NATCHEVA, Polina RESIGNED | Secretary | 31 Mar 2016 | 11 Jan 2024 | | | 3 Lindenwood, Crockford Lane, Chineham Business Park, Basingstoke, Hampshire, RG24 8QY, England |
| TANCRED, Nicola Anne RESIGNED | Secretary | 11 Jan 2024 | 01 Mar 2026 | | | C/O Xylem Water Services Ltd, Private Road 1, Colwick Industrial Estate, Nottingham, NG4 2AN, England |
| INVENSYS SECRETARIES LIMITED RESIGNED | Secretary | | 17 Dec 2003 | | | Invensys House, Carlisle Place, London, SW1P 1BX |
| MAWLAW SECRETARIES LIMITED RESIGNED | Secretary | 17 Dec 2003 | 31 Dec 2010 | | | 201, Bishopsgate, London, EC2M 3AF |
| TMF CORPORATE ADMINISTRATION SERVICES LIMITED RESIGNED | Secretary | 31 Dec 2010 | 13 Jul 2015 | | | 5th, Floor, 6 St. Andrew Street, London, EC4A 3AE, United Kingdom |
| BAYS, Dennis Randall RESIGNED | Director | 19 Dec 2013 | 15 Aug 2017 | United States | April 1955 | 3 Lindenwood, Crockford Lane, Chineham Business Park, Basingstoke, Hampshire, RG24 8QY, England |
| BAYS, James Claude RESIGNED | Director | 02 Jul 1999 | 30 Mar 2001 | | July 1949 | 28 Elmstone Road, Fulham, London, SW6 5TN |
| BENTLEY, Laurie James RESIGNED | Director | 18 Jan 2024 | 01 Mar 2026 | England | December 1982 | C/O Xylem Water Services Ltd, Private Road 1, Colwick Industrial Estate, Nottingham, NG4 2AN, England |
| BOUCHER, Jonathan RESIGNED | Director | 17 Dec 2003 | 06 Oct 2004 | | January 1957 | 33 Taylor Lane, Harrison, New York, 10528 NY |
| BROWN, Robert Casson RESIGNED | Director | 01 Sep 1997 | 31 Dec 1997 | | March 1939 | 38 Newlands Avenue, Melton Park, Newcastle Upon Tyne, NE3 5PX |
| CLAYTON, John Reginald William RESIGNED | Director | 09 Feb 2001 | 17 Dec 2003 | England | December 1950 | Matley House, Grange Lane, Little Dunmow, Great Dunmow, Essex, CM6 3HY |
| COX, Garry Edward RESIGNED | Director | 19 Dec 2013 | 28 Jun 2019 | United Kingdom | March 1967 | 3 Lindenwood, Crockford Lane, Chineham Business Park, Basingstoke, Hampshire, RG24 8QY, England |
| CRUICKSHANK, Dennis Alan RESIGNED | Director | 01 Sep 1997 | 31 Mar 2000 | | August 1947 | 5 Eustace Road, Merrow Park, Guildford, Surrey, GU4 7EB |
| ENGHAUSER, Courtney RESIGNED | Director | 19 Dec 2013 | 30 Jun 2017 | United States | March 1972 | 3 Lindenwood, Crockford Lane, Chineham Business Park, Basingstoke, Hampshire, RG24 8QY, England |
| GORE, Nicholas David RESIGNED | Director | | 10 Jun 2003 | United Kingdom | September 1952 | Wisteria Cottage, Westcombe, Shepton Mallet, Somerset, BA4 6ER |
| HARNESS, Dan Wetzel RESIGNED | Director | | 16 Dec 1998 | | October 1948 | 305 Bridlewood Drive, Greensburg, Penn 15601, FOREIGN, Usa |
| KERR, Vincent John RESIGNED | Director | 19 Mar 2014 | 01 Apr 2022 | United Kingdom | June 1961 | 3 Lindenwood, Crockford Lane, Chineham Business Park, Basingstoke, Hampshire, RG24 8QY, England |
| LAHM, Gerhard RESIGNED | Director | 04 Dec 1998 | 31 May 2002 | | March 1951 | Mecklenburger Strasse 4, Birkenheide, Germany |
| LILLEY, John Martin RESIGNED | Director | 04 Dec 1998 | 31 May 2002 | | June 1958 | 1101 Mersey Lane, Raleigh, North Carolina 27615, United States |
| MAINZ, Peter RESIGNED | Director | 01 Oct 2001 | 19 Dec 2013 | United States | June 1964 | 1320, Castor Lane, Raleigh, North Carolina, 27614-7215, Usa |
| NATCHEVA, Polina Yordanova RESIGNED | Director | 15 Aug 2017 | 11 Jan 2024 | England | February 1977 | 3, Lindenwood, Crockford Lane, Chineham Business Park, Chineham, Basingstoke, RG24 8QY, England |
| POCOCK, Ashley Francis RESIGNED | Director | | 31 May 2002 | | April 1955 | 132 Badshot Park, Badshot Lea, Farnham, Surrey, GU9 9NF |
| SENERI, Barry Wayne RESIGNED | Director | | 16 Dec 1998 | | November 1950 | 106 Second Street, Masontown, Penn 15461, United States |
| SPENCER, Rachel Louise RESIGNED | Director | 30 Mar 2001 | 17 Dec 2003 | United Kingdom | February 1966 | The Cottage, Amy Lane, Chesham, Buckinghamshire, HP5 1NB |
| STEVENS, David John RESIGNED | Director | 31 Dec 1997 | 14 May 1999 | | March 1950 | 42 Burghley Road, Wimbledon, London, SW19 5HN |
| THOM, James Demmink RESIGNED | Director | 01 Sep 1997 | 09 Feb 2001 | | July 1946 | Tollgate Cottage, Turners Hill Road, Crawley Down, West Sussex, RH10 4HG |
| VAUGHAN, Aubrey Winfred RESIGNED | Director | | 25 Apr 1997 | | July 1938 | 45 Fort Walker Drive, Hilton Head Island, N Carolina, 29928, Usa |
| ZYCH, Douglas RESIGNED | Director | 17 Dec 2003 | 06 Oct 2004 | | November 1971 | 172 Field Point Road No 4, Greenwhich, Connecticut, 06830, Usa |