It was called English Heritage Full Steam ahead, and was about the redevelopment of Kings cross Station over the next few years so that it can add 10 million more passengers.
I had very mixed feelings about it. English Heritage as with the three other programmes in the series came out of it with a very mixed record. While doing their best to keep some of the victorian features in the station (mainly some victorian cast Iron brackets and the lattice iron pedestrian bridge over the platform) they just seemed incapable of making a solid decision early in the process put it in writing, and then keeping to that decision. It seems to have been like that the whole series, and they just don't seem to be very businesslike and were adding to everyones costs and adding to the delays due to their way of working.
They did have the good sense to preserve a couple of Wagon turntables that they discovered during the demolition process of the goods yard and these will be made to working condition again and incorporated into the redevelopment.
Anyway I think the upshot was that they got there in the end and the Station will look great once the nasty 1970's additions have been removed and the new sweeping concourse added in a different place. They did preserve the bridge but its been removed and is held off site. Its too big for a preserved railway, so I am not sure what its future may be.
Anyway the programmes on the iplayer if anyone is interested.
http://www.bbc.co.uk/iplayer/episode...l_Steam_Ahead/