All changes to tower
| Date | Change | Source |
|---|---|---|
| 22 Nov 2016 | fr1,fr1A: info added | John Baldwin via database |
| 6 Jan 2014 | 5: historically important | David Knight via e-mail |
| 8 Jul 2012 | 4: date amended (approx not precise) | Philip Denton via 00009987 |
| 8 Nov 2004 | Tenor nominal added | Bill Hibbert via e-mail |
| 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 |