I’m not sure why they even asked for RSVPs as it was readily apparent that anyone who walked by could get in – after the stood in line waiting for everyone in front of them to cram in. They are very lucky the fire marshall wasn’t around (or had his eyes closed).
At any rate, it looks like it will be a very popular place. If it is like the other M&S restaurants, the food and the service will both be very good and generally be a very positive experience. I’m glad to have it so close to home.