Oh, fabulous! I was talking to someone at the auditions who'd seen that production in London. I didn't, but my first Sweeney experience was in the Bridewell Theatre just off Fleet Street, and it was a promenade performance - no seats for the audience, you found a bench or a cushion or floor, or stood at the sides, and the acting went on around you. *Very* exciting, even though I was not invited to sit at one of Mrs Lovett's tables and partake of pie. Hmm.