All changes to tower
| Date | Change | Source |
|---|---|---|
| 19 Jan 2012 | 1,2,4,5: diam added; 4: (app) wt added; | John Baldwin via database |
| 1-5: frame id added; frame info added | John Baldwin via database | |
| 11 Jul 2011 | 1-5: nominal added; 4,5: canons added | Philip Denton via 00009508 |
| 5 Aug 2009 | Placename is not two words but one | David Floyd; OS Landranger map via e-mail |