All changes to tower
| Date | Change | Source |
|---|---|---|
| 18 Sep 2017 | 1: wt added | David Sloman via 00012439 |
| 11 Mar 2013 | Precise tenor wt available (rather than ~7cwt) | Chris Pickford (JT 1827 records) via pNBR |
| 2-6: wt added | Chris Pickford via 00010310 | |
| 4 Jul 2010 | 1-6: frameid added; frame info added | James Clarke via e-mail |