All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Jun 2019 | Mon PN now weekly S | C Gardner via e-mail |
| 8 Dec 2018 | PN info modified (doors locked 19:30) | John Rogan via e-mail |
| 7 Oct 2015 | Mon PN does not now take place on 1st of month | John Rogan via e-mail |
| 21 Aug 2011 | PN changed from Thu to Mon | John Rogan via e-mail |
| 8 Sep 2005 | Grid Ref correction (from SD483615) | Tim Jackson#83 via e-mail |