All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Oct 2024 | Frame Fr1 added | Jack Pease from the Christopher Dalton papers |
| 29 Oct 2017 | 1-6: nominal added | David Kelly via e-mail |
| 25 Jan 2004 | URL changed | Gary J Sheppard: SDGR webmaster via e-mail |
| 8 Jan 2004 | URL added | Gary J Sheppard: SDGR webmaster via e-mail |