All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Apr 2010 | 4: is historically important ('listed' by CBC) | John Baldwin via database |
| 12 Mar 2008 | Mon PN info added | David Floyd (Assn webmaster) via e-mail |
| 9 Jun 2006 | Tenor nominal added (Eb-3c) | Andrew Higson via pNBR |