Bakerloo line extension to Camberwell

Further to my post yesterday about the possible death of Crossrail, the Camberwell Online Blog has Tweeted about an article in Transport Briefing which once again raises the possibility of extending the Bakerloo line to Camberwell (a no brainer, since the station in Camberwell already exists) and also to Lewisham (which would be very exciting). Also, it mentions the idea of extending the DLR from Lewisham to Hayes. That's a new one to me, but would also be a great development.

Just one question... From whence cometh the money?