Yes, I hope it is open to the public Howard as you started a thread on it!
DS used to regularly hold talks and anyone could go, but one might have to pay just a bit more entrance fee. The Dover Society is only £6 a year - that's just two pints to alcoholics like me - so it's probably worth joining anyway.
http://www.doversociety.org.uk/6-Programme+.html
Knowing a purely non-political thread is like hen's teeth on this forum, I thought I would bite the bullet and chuck my oar in too. Drawing your attention to the above link, it looks like Charlie is booked too in April.