Thanks Cavil:
This is the kind of information that is quite helpful - especially the theatre info. I'm going to check out the VIP tickers today.
Bill U
You're welcome.
Regarding the same-day, half-price ticket booth in Leicester Square, it is a standalone building within the square itself. If you Google map zoom in on Leicester Square it shows TKTS, the building at the southern end of the square. There's a small clock tower on top of the building. Multiple smaller outfits in storefronts near the square claim to be the "real thing". They are not. I once made the mistake, as a London rookie many years ago, of buying half price tickets and discovered I was charged more than face value! The shyster outfits will have signage advertising the "big" shows like Phantom, Les Mis, Lion King---you'll never get those for half price.
The genuine ticket booth has an electronic tote board listing all the shows and clearly showing the discount they offer. Not everything is half price.
Nearly always available half-price (and a great bargain) is the long-running ghost story The Woman in Black.
Two knock-your-socks-off musicals I recommend are We Will Rock You, and Beautiful---The Carole King Musical.
Please report back when you complete your trip. Bon voyage.