Yeovilton is a local branch of the RAeS. The event is being organised by a Lieutenant and TCT is being asked, volunteered, paid or whatever to give the Eric Brown lecture. I would say there is no doubt that Yeovilton know exactly who the speaker is etc. Don't forget she is an Honorary Lieutenant Commander also.
I find it so disrespectful to the memory of Captain Brown that this lecture should be given by someone who is not worthy. Don't forget she also gave the Shackleton lecture as well. Simply insulting.