On Fri, 18 Nov 2005 05:16:23 -0000, (Mark Brader) wrote:

Does London have a system of steam mains that provide winter heating
to various buildings, as some cities do?

There was hydraulic power until quite recently.
http://www.subbrit.org.uk/sb-sites/s...on/index.shtml

Battersea Power Station used to pipe hot water under the Thames to
provide heating to Dolphin Square and Pimlico. But I don't know of
any large-scale steam system. New York has one.