We visited Lavash on a saturday night, pre-booked for a large group. We had 10 adults and as many children. It seemed the staff were keen to take our orders and get the food out....and then us! The waiter was extremely rude. Not only did he shove menus rather forcibly in front of us, whilst we were in mid conversation, he made us order rather than converse with our guests! This is a family restaurant, yet the children were CONSTANTLY told off by the staff for talking! Eventually we had to leave. As for the food, very average for an Iranian restaurant - I have been to many in London and this comes near the bottom of my list. The chicken and lamb kebabs were dry and overcooked. Over priced as well.
Will definitely NOT be visiting Lavash again.