Very very dull & boring

The worst show I have ever had to sit through. We were very tempted not to go back to our seats after the interval. Theatre was only 2/3 full and there were large parties of school children which shows that they must be selling the seats off cheaply so we feel very ripped off at having paid £80 plus per seat for our pre booked seats. Has put us off London theatre for a while, very very bad value for money not a pleasant evening out.