All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Apr 2020 | 1,4,5: turning added; fr1: truss,layout added | Tim Jackson via e-mail |
| 14 May 2017 | 1-6: nominal added | Nick Bowden via 00012148 |
| 4 Mar 2014 | PN rotation again modified | David Floyd (info: Rodney Gay) via e-mail |
| 22 Jan 2014 | PN rotation modified | David Floyd via e-mail |
| 30 Dec 2011 | 1,5: canon info added; 2,3,6: turning added; | John Baldwin via database |
| 1-6: frameid added; frame info added | John Baldwin via database | |
| 17 Dec 2011 | 2,3: founder amended | Matthew Higby via e-mail |
| 7 Oct 2011 | PN rotation modified (now excludes Chewton Mendip) | David Floyd via e-mail |
| 16 Jun 2011 | 1,4,5: diam added; 4: wt,founder,date amended | Chris Pickford via 00009416 |
| 14 Jul 2010 | PN info modified | David Floyd via e-mail |