All changes to tower
| Date | Change | Source |
|---|---|---|
| 6 Mar 2025 | Fr1: date, material, maker added, layout amended | John Greenhough, from personal visit |
| 3 Jul 2022 | Fr1: diagonal | C J Pickford visit 1980 |
| 2 May 2019 | 1-3: turning,frameid added | John Greenhough via 00013405 |
| 3 Dec 2006 | Tenor note & nominal (Bb+7c) added | Nick Bowden#68 (ex GAD NBR spreadsheets) via e-mail |