All changes to tower
| Date | Change | Source |
|---|---|---|
| 16 Jan 2017 | 1-6: frameid,canon info added; frame info added | David Sloman via 00011959 |
| 15 Jan 2017 | 1-6: nominal,diam added | Tim Jackson via 00011956 |
| 14 Aug 2013 | URL added | Rosalind Martin via Twitter |
| 24 May 2008 | PN info added | SCA 2007 Report via JCB |
| 7 Dec 2006 | Dedication is S Mary V not simply S Mary | Alan Baldock via e-mail |