However the presenter slipped up and a much longer delay was described, which you can listen to here on Radio Fail.
Incidentally, London Underground apologised for the incident and said "We worked to get people off trains as quickly as possible, but due to a number of trains in tunnels it took some time to get passengers off some of the trains."
London TravelWatch have asked for investigation to take place. Jo deBank told the BBC "Getting stuck for that length of time is horrendous." Just as well she didn't hear the radio report!