Dr Allan Parker gave us a fascinating presentation on the Langham Dome. While some of us visited a few years back we all learned a great deal more this time. It is the only preserved world war 2 anti-aircraft training facility. Ingenious technicians created the first use of virtual reality to train and select gunners without wasting time, ammunition and money. Now a museum and working example, the Dome is well worth a visit when we are allowed out again.