All changes to tower
| Date | Change | Source |
|---|---|---|
| 9 Oct 2014 | PN info amended: now only occasional and check advised | David Floyd (info: Holford-at-bath-wells.org ) via e-mail |
| 21 Dec 2011 | 2,3: canon info added; 1-6: frame id added; frame info added | John Baldwin via database |
| 2 Jul 2010 | PN information added | David Floyd via e-mail |