All changes to tower
| Date | Change | Source |
|---|---|---|
| 11 Dec 2018 | PN info added | Izabelle Bimson (conf: Denise Fletcher, Twr Corresp) via e-mail |
| 19 Jul 2012 | Sct: wt, (approx) date added | Chris Pickford via 00010012 |
| 1 Sep 2011 | all: nominal, canon info, frame id added; frame info added | Philip Denton via 00009666 |