All changes to tower
| Date | Change | Source |
|---|---|---|
| 28 Dec 2021 | 6: weight amended | JT records (other weights and diameters correct) via Chris Pickford |
| 8 Dec 2021 | 3-6: cast year amended | Chris Pickford (in consultation with GAD) via Email |
| Additional reasons for amended cast years | Chris Pickford | |
| 31 Jul 2018 | PN info added | Izabelle Bimson(info: Sue Dawson) via e-mail |
| 2 Nov 2012 | 1: founder amended | Peter Dyson via e-mail |
| 6 Feb 2007 | Tenor nominal added (B-42c) | Andrew Higson via pNBR |