All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Apr 2013 | fr: truss, layout added | Mike Chester via e-mail |
| 7 Mar 2010 | 1-3: turning, frame id added; frame info added | Mike Chester via 00008527 |
| 10 Jun 2009 | PN info (irregular Tue) added | Anthony Cotton: DDA Annual Report via e-mail |
| 20 Apr 2009 | 1,2: nominal added | Nick Bowden via 00007323 |
| 17 May 2004 | Tenor nominal added | Nick Bowden#39 (David Kelly data) via e-mail |