| Allan Charles Edwin Cockell | Director | 31 Mar 2011 | 26 Apr 2011 | British | 65 years |
| David Mark Bardsley Parry | Director | 31 Mar 2011 | 10 Nov 2011 | English | 62 years |
| David Mel Zuydam | Director | 28 Feb 2014 | 16 May 2014 | British | 65 years |
| Ian Karl Buehring | Director | 18 Mar 2011 | 26 Apr 2011 | British | 73 years |
| Jan Grothusen | Director | 31 Mar 2011 | 26 Apr 2011 | German | 54 years |
| John Ian Potter | Director | 18 Mar 2011 | 10 Nov 2011 | British | 63 years |
| John Michael Brady | Director | 31 Mar 2011 | 26 Apr 2011 | British | 82 years |
| Jonathan Masson Payne | Director | 10 Jun 2015 | 20 Oct 2017 | British | 63 years |
| Kevin James Boyd | Director | 31 Mar 2011 | 26 Apr 2011 | British | 62 years |
| Malcolm Thomas Hallsworth Roberts | Director | 18 Mar 2011 | 26 Apr 2011 | British | 77 years |
| Nathan Richards | Director | 26 Apr 2011 | 28 Feb 2014 | British | 57 years |
| Peter Neden | Director | 28 Feb 2014 | 10 Jun 2015 | British | 58 years |
| Richard Morris | Director | 26 Apr 2011 | 26 Apr 2011 | British | 51 years |
| Richard Morris | Director | 26 Apr 2011 | 23 Oct 2013 | British | 51 years |
| Robert Erling Ashby | Director | 18 Mar 2011 | 26 Apr 2011 | British | 79 years |
| Russell William James Miles | Director | 18 Mar 2011 | 26 Apr 2011 | English | 61 years |