All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 May 2020 | 6: diam amended; fr1: material added | Chris Pickford via 00013763 |
| 30 Aug 2018 | 2-6: nominal added | Chris Pickford via 00013051 |
| 24 Aug 2018 | 1: nominal added,canon info amended | Nigel Taylor via 00013032 |
| 2 Mar 2018 | 1-6: canon info,turning,frameid added; 2: date amended; | Chris Pickford via 00012773 |
| frame info added | Chris Pickford via 00012773 | |
| 21 Sep 2004 | Slight change to dedication to match Crockford entry | Graham Nabb check via e-mail |