All changes to tower
| Date | Change | Source |
|---|---|---|
| 5 Feb 2023 | Frame Fr1: maker, year confirmed; truss, layout added | Andrew Aspland via Frames Backlog |
| 8 Dec 2017 | 1-8: frameid added; frame info added | John Baldwin via database |
| 30 Sep 2009 | PN is every Tue (was 1,3,5) | Margaret Perrott via e-mail |
| 23 Jan 2007 | PN info reverted to 'alt' from 1,3,5 Tue | John Cater (info: Margaret Perrott) via e-mail |
| 7 Jun 2004 | PN info refined (from 'alt') | Margaret Perrott via e-mail |
| 21 May 2004 | PN info added | Margaret Perrott via e-mail |