All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 Feb 2025 | 1938 overhaul description added; 1-6: turning added | Richard H Johnston #008237 |
| 27 Jul 2017 | 4: date amended (to approx) | David Sloman via e-mail |
| 21 Jul 2010 | 1-6: frameid added; frame info added | James Clarke via e-mail |
| 9 Jun 2009 | 1-6: nominal added; 1,3,5: diam amended | Andrew Higson via 00007558 |