I'm afraid I couldn't get to the AGM this year (first time for many years) but William (a G3S member) made this excellent video of the trains running outside, as well as some of the trade stands and other exhibits inside.
The feedback from the Show seems to be very good, so unfortunately I missed a fun day. :-(
https://www.youtube.com/watch?v=MhkokVVtJ4w (https://www.youtube.com/watch?v=MhkokVVtJ4w)
Regards,
IanT