There have been two separate generations of trams in London, from 1860 to 1952 and from 2000. There were no trams at all in London between 1952 and 2000.
The current generation of trams started with the opening of Tramlink in 2000. Croydon previously had many tramlines.
Tramlink operates with modern articulated tramcars of Bombardier low-floor design called CR4000, based upon the K4000 type of the Cologne Stadtbahn, with the tram units numbered from 2530. This number was the next in sequence from the last London tram, number 2529, withdrawn in 1952.[21] Since it opened on 11 May 2000, the 38 km of track have been operated by FirstGroup on behalf of Transport for London on three routes across South London.