All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Jul 2017 | 1-8: frameid added; frame info added | David Sloman via e-mail |
| 10 Jun 2009 | PN info added | Anthony Cotton: DDA Annual Report via e-mail |
| 9 Dec 2006 | Tenor nominal added (Ab+46c) | GAD NBR spreadsheet via pNBR |