All changes to tower
| Date | Change | Source |
|---|---|---|
| 28 Oct 2019 | frame: material amended,truss added | Tim Jackson via e-mail |
| 11 Mar 2016 | 1-4: frameid added; frame info added | David Sloman via e-mail |
| 8 Nov 2012 | 2,3: wt amended | Chris Pickford via 00010130 |
| 13 Oct 2011 | 1: historically important | David Knight via e-mail |