Very popular, definitely have to book. Salamander is a small restaurant with tables close together so when it's full it can be difficult to hear each other across the table. There was a good choice of food on the menu so it's fine if you don't want seafood.
The cornish sole we had was cooked to perfection and available with a choice of sauces served in a little accompanying dish. Starters and main course were excellent. Very reasonably priced.