All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Jul 2010 | 1-6: frame id added; frame info added | James Clarke via e-mail |
| 14 Jun 2004 | GF is definitely not correct - from a visit April '04 | Andy Marchant via e-mail |
| 3 Jun 2004 | GF added | Bayton & Pascoe 'Bells of Devon' via JCB |