All changes to tower
| Date | Change | Source |
|---|---|---|
| 21 Feb 2019 | PN amended (from Thu) S | G Swann (Tower Sec) via e-mail |
| 21 Jul 2017 | 1-6: frameid added; frame info added | David Sloman via e-mail |
| 14 Apr 2009 | All: nominal, canon info; 6: yr; 2,3,5,6: diam amended | Andrew Higson via 00007281 |