All changes to tower
| Date | Change | Source |
|---|---|---|
| 19 Apr 2020 | Listing Grade changed to II* (from II) | TimJ / NHLE via e-mail |
| 22 Jul 2016 | frame: date,maker added | Philip Denton via e-mail |
| 17 Jul 2016 | frame info added; 1-8: frameid added | David Sloman via e-mail |
| 29 Apr 2009 | 1-8: nominal,diam canon info added; 1-7: wt added | Andrew Higson via 00007380 |
| 24 May 2008 | PN info added | SCA 2007 Report via JCB |