All changes to tower
| Date | Change | Source |
|---|---|---|
| 11 Aug 2022 | 1-5: nominal added | Recording taken and analysed by David Kelly on 11/08/22. |
| 21 Dec 2006 | Unspecified edit | |
| 25 Jan 2004 | URL changed | Gary J Sheppard: SDGR webmaster via e-mail |
| 8 Jan 2004 | URL added | Gary J Sheppard: SDGR webmaster via e-mail |