Manchester's tram system has extended though?
It's now the biggest in the UK.
Nottingham has been successful, although some won't be in favour of how it was funded, by car parking space taxes.
And even Edinburgh is now hailed as a success despite its earlier build problems?
There is a lobby group in Cambridge which wants to build a metro system, which would use tunnels under the historic core, and link former railway lines such as that which went to Haverhill. I reckon it is a great idea which would solve Cambridge's traffic issues, but unfortunately the local politicians are pro-bus and guided busway minded....
I have been hearing through the grapevine that Businesses are saying that they would not have relocated to Cambridge if they had been aware of how awful the acccesibility is in the area due to Road Traffic. Current Political thoughts are indeed softening to the concept of an Underground (Trams?) for the City Centre popping up to Street Trams where possible. Might just work, it does in Charloi in Belgium. Be even better if it came over to St.Neots via Cambourne and the other major Housing planned (known proposed and undeclared) between those 2 points. Apparently the Univercities that pretty well own Cambridge are distinctly opposed to Trams in the Streets but are apparently unconcerned about polluting Diesel Busses.
http://www.urbanrail.net/eu/be/char/charleroi.htm
As for London I do not see that the Cross River may have been shelved due to Crossrail 2, this will come under the River much further to the West and serve a pretty well different area.
Croydon's upgrades have just been about Doubling the Wimbledon Route and changing the Platform Layout at Wimbledon, effectively tinkering at the edges. Not by any standards Extensions, but still pretty costly I must admit.
Edinburgh is an interesting one, obvious that it would be popular with the travelling masses. Another story about Polititians not understanding what they are about and no doubt pushing up costs needlessly with endless Consultants Reports.
Still we can look at Nottingham, Sheffield (Tram Train extension finally started to Rotherham), Croydon, Birmingham (extended once, another on the way with consultation for 2 more), Manchester (Cross Town Route 2 imminently to open), Edinburgh (pobably be completed to full original planned system), Blackpool (upgraded and extension on the way) systems with great pride and interest. Plus the feel like Tram Systems at Newcastle and Docklands.
JonD
