London Tube Congestion

Yesterday we encountered severe overcrowding and service interruptions twice on the London underground system. It seems as though they do not run enough trains on the weekend to handle the huge crowds of people. During the week during rush hour as soon as one train leaves the station the next train pulls in. But on Saturday there were so many people on the platform that authorities had to prevent additional people from even entering the lifts or escalators to take them to the lower train platforms. In one case we were forced to take different train lines and walk for 20 minutes to get back to our hotel. The second time we had to hire a bicycle powered 2 person cabbie to take us three subway stops back to our hotel. What has happened to the London underground? It used to be so reliable, but no longer! London is really full of people!