All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Dec 2017 | 1-5: nominal added | Chris Pickford via 00012650 |
| 9 Dec 2017 | frame: (inferred)date,maker added; material amended | John Baldwin via database |
| 5 Dec 2016 | 6: nominal added | George Dawson via e-mail |
| 4 Dec 2016 | 1-6: frameid,turning added; frame info added | Andrew Higson via e-mail |