Hi, we're going to see this at Cambridge Theatre Friday after new year. It says running time approx 2hrs 40mins Inc. Interval so finishes at 9.40ish would we have time to get to Liverpool St. Stn. For 10.30 train do you think? The next reasonable priced train not until 11.30. Not sure what to do!! When they say 2hrs 40mins are you out on the street pretty quickly or does it take ages? We'd plan to grab a cab.