The event runs from 6.30pm to 7.30pm & tickets can be pre booked on 020 7565 7298 and cost £8.00 adults; £6.00 concessions; £4.00 student. However, I've managed to get a couple of tickets to go along. If you'd like to come with me, send an email to themole AT goingunderground.net or DM me on Twitter. As usual first come first served.
Looks like Games had a slightly more efficient service to work with if his A Train Every 90 seconds poster, is anything to go by. I hear that King's Cross Tube station was a tad overcrowded this morning and was closed for a while. So well done if you managed to avoid that.