All changes to tower
| Date | Change | Source |
|---|---|---|
| 4 Jul 2020 | fr1: layout added | Chris Pickford via e-mail |
| 27 Jul 2018 | 1-8: frameid added; 1-3: turning added; frame info added | Chris Pickford via e-mail |
| 9 May 2012 | Placename amended to OS version (without hyphens pro tem) | Sam Austin; OS Map (Fugawi CD version) via e-mail |
| 27 Feb 2007 | Tenor note not E; nominal added (F-49c) | Andrew Higson via pNBR |