My son, his wife, 6 year old son, and 2 year old daughter are flying to London on January 21 for 10 days. This starts as a business trip and ends as a family vacation. He definitely needs a car seat for the taxi ride to the hotel. Apparently his business group does not use a black cab company that offers this option. He asked me to ask you all if you know of any reliable taxi companies (or perhaps other transport options)that they might use.

Thanks in advance, Janet Riverview, FL