For £200 m for a new Royal Yacht we could have two and a half Kms (less than 2 miles) of Metro trams to replace ...

For £200 m for a new Royal Yacht, we could have two and a half Kms (less than 2 miles) of Metro trams to replace old-fashioned buses and trains!  And tram traffic lights, too!  And more street furniture!  And less room for everything and everyone!

£81 m/Km for Metro Eastside extension gives you 2.5 Km of tram construction on roads for £200 m.  200 divided by 81 = 2.5 approx