Thanks Tony and Pooh. I went last night but was too knackered by the time I got back to post.
I started off by very briefly meeting Rob at the theatre, but we didn't have time to talk much beyond the introductions and afterwards I had to leave straight away for my train back to Worthing, so I missed the after-show drinks.
The show itself was excellent with Terry in great form. If you didn't know better, you wouldn't realize that he has alzheimers. His wit and quickness of mind was evident throughout the (almost) two hour recording - I have no idea how they are going to edit it into a half-hour programme. The other guests were a New Scientist physics correspondant and author (I think his name was Mike Marshall), and comedian Shappi Khorsandi. I won't go into detail about the show but I thought Terry and Mike exchanging views was actually funnier than the professional comedians who seemed a bit out of their depth (as was I) when the topics were about quantum, infinite multiverses, and Omega Point Theory.

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Also, the subject of Terry Pratchett, two Brownies, and a rubber chicken came up. PMSL

For those who maybe haven't heard the story (I hadn't up until last night), I shall remain silent until after the broadcast, scheduled for Monday 10th May.