All changes to tower
| Date | Change | Source |
|---|---|---|
| 1 Jan 2023 | Frame Fr1: truss added, layout amended | Mike Chester personal visit #004361 |
| 1 Aug 2009 | 1-8: turning added; all: frame id added; frame info added | Mike Chester via 00007940 |
| 23 Mar 2006 | Tenor nominal added (B-1c) | Andrew Higson via e-mail |