All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 Jul 2010 | 1-6: frame id added; frame info added | James Clarke via e-mail |
| 13 Jun 2010 | Tenor note not A; nominal: Ab-29c | Nick Bowden via pNBR |
| 1-6: nominal added, note values amended | Nick Bowden via 00008671 | |
| 10 Nov 2004 | PN info added | Wendy Campbell via www |