All changes to tower
| Date | Change | Source |
|---|---|---|
| 13 Jul 2009 | 1-6: nominal & turning info added; 1,3,4,5,6: diam amended; | Andrew Higson via 00007782 |
| Frame info added | Andrew Higson via 00007782 | |
| 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 |