The dates for this year's Heritage Open Days are now out, and Rowner is Sat 12 Sept. See link for times & details.
S2693 sits (or sat) on the roof visible from outside but not reachable
TUK user martinc gained access to the trig last year: hopefully it'll be available this year too. I notice however someone has suggested the pillar may have subsequently gone...
I'm not sure I can make it this yearbut hopefully it'll be run in 2010 too. Good luck to anyone who attends, and let us know how it goes. And be sure to take a torch :-)