By By Kev Hedges Oct 18, 2010 in Travel London - The Monday morning journey into work turned into a nightmare for thousands of people when they were stuck underground in packed, airless conditions for two hours as a power failure brought tube trains to a stand-still. A total of five tube trains were affected by the power failure. One each at Swiss Cottage and Westminster and three stuck between Baker Street and St. John's Wood. Commuters described conditions as "packed, humid and horrendous" reports One commuter Sarah Khan, 24 told There was a pregnant lady who was very upset, and another man who was carried to the front of the train where there was a doctor who helped. After two hours they said we would have to get off and walk back to St John's Wood. I was just relieved to be off the train. I haven't been able to go to work because I was so traumatised. I did not want to get back on a Tube. I understand it broke down, but why did it have to take so long? A spokeswoman for Due to power supply problems in the Baker Street area, the Jubilee line was suspended between Finchley Road and London Bridge at 0852 this morning. Five trains were stalled as a result. Passengers were taken off all five trains, with the last returned to stations at around 1130. London Underground would like to apologise to customers whose journeys were disrupted this morning particularly those who were on the stalled trains. An investigation is currently under way to establish the cause of the power failure. In total around 4,000 passengers were directly affected by one of the network's worst ever shut-downs. About 2,400 passengers were forced to walk for more than twenty minutes in dark, rat infested dirty tube tunnels along the Jubilee line with staff carrying torches at the front showing them the way. Many were so traumatised by the ordeal that some commuters, who videoed the horror, saw one man receiving treatment by paramedics at St. John's Wood station with an oxygen mask.A total of five tube trains were affected by the power failure. One each at Swiss Cottage and Westminster and three stuck between Baker Street and St. John's Wood. Commuters described conditions as "packed, humid and horrendous" reports Sky News One commuter Sarah Khan, 24 told Evening Standard A spokeswoman for Transport for London said an investigation would take place, and added:In total around 4,000 passengers were directly affected by one of the network's worst ever shut-downs. More about Thousands trapped underground london, London underground tube power, Tube power traps hundreds More news from thousands trapped un... london underground t... tube power traps hun...