From BBC London:
A model of an air-conditioned Tube train, due to be introduced on the Metropolitan Line in two years time, has been unveiled. The new trains will be added to the sub-surface Circle, District and Hammersmith and City lines in 2011.
Having been reminded only this morning of how crammed Central Line trains get, even as late as 10.00 a.m., I share the rejoicing of the mayor. You can see the model for yourselves at Euston Square Gardens from Saturday until October 2nd.