Marsham Court, Marsham Street, SW1 (020 7834 9552) £80.
Reliable if unspectacular British food. Once fashionable, it has lost a little of its lustre, though no one seems to have noticed at the Houses of Parliament, from where they flock to its low-ceilinged dining room. The food - and service - is comfortingly old-fashioned: stilton-and-onion tart, lemon sole and lamb rump are designed to keep MPs happy.