All changes to tower
| Date | Change | Source |
|---|---|---|
| 9 Aug 2015 | frame: maker,date added | John Baldwin via database |
| 5 Mar 2010 | 1-6: turning, frame id added; frame info added | Mike Chester via 00008502 |
| 10 Jun 2009 | Mon PN is not held on Bank Hols | Anthony Cotton: DDA Annual Report via e-mail |
| 29 Jun 2005 | PN is not Wed | Ian Webb via e-mail |