All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Oct 2017 | Indication of toilet facility added | Ian Oram via e-mail |
| 16 Jun 2017 | 1-6: frameid added; frame info added | David Sloman via e-mail |
| 24 Jul 2011 | 1-5: diam added; 6: diam amended | John Baldwin via 00009522 |