All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Sep 2022 | 1: weight amended | Whitechapel records via David Sloman |
| 12 Jan 2019 | Thu PN now alterates with Bronllys | David Katz (Practice Secretary) via e-mail |
| 13 Sep 2017 | 1-6: diam,turning added; | Chris Pickford via 00012419 |
| fr1: date amended,material,truss,layout added | Chris Pickford via 00012419 | |
| 1 Mar 2017 | PN info added | David Katz via e-mail |
| 2 Nov 2012 | 4: founder amended | Peter Dyson via e-mail |