Festive theatrical feasts serve audiences a slap-up dinner with their entertainment. But is what's on stage as appetising as what's on your plate? In west London, a line of smartly dressed theatregoers on a street corner enter a building and walk back in time. We pass through tight lamp-lit corridors and arrive in a cavernous hall, with tables laid and lanterns dangling overhead. This is Charles Dickens' parlour, whe…
