So here is a photo of the Central Hall, on Tuesday morning. Imagine lots of lovely sunshine and people walking around in short sleeves and the such like, not a grey and wet day in January! To the right is one of the three spires of Coventry, a part of the old town wall. It's now a cafe, or art gallery, or both - it changes frequently between the two and admittedly I didn't go and see what it is currently.
This is the rather huge main hall. It seats 845 when all the seats are in. For our purposes, imagine that the central two blocks of seats aren't there. Upstairs there are over 300 seats, so plenty of space to watch proceedings as they take place.
And imagine a stage over where the lectern is, and lots of stalls where the seats are in the main part of the ground floor.