All changes to tower
| Date | Change | Source |
|---|---|---|
| 23 Jun 2019 | 1-8: turning added; 3-8: canons added | Tim Jackson via 00013481 |
| 9 Aug 2017 | 1-8: frameid added; frame info added | David Sloman via e-mail |
| 14 Sep 2010 | 1-8: nominal added | Nick Bowden via 00008817 |
| 3-8: nominal amended (values from G&J records) | George Dawson via e-mail |