"Very enjoyable lunch in the upstairs part of Cellarium (worth booking an upstairs table). I had the wild mucshroom and tarragon fregola which was delicious. Ambiance is relaxed, the room light and airy with unusual roof scape of Westminster Abbey. Service was hit and miss. Despite me booking, there was no acknowledgement of this, order taking slow and general lack of attentiveness. This wouldn't stop me going again, but it's a shame for a hidden gem in Westminster."