In living memory London has been blessed with mild weather. The frost fayres on the frozen River Thames in Dicken's and Pepys' days are a folk memory. The last killer fogs of the late fifties were banished by the Clean Air Acts of the sixties. The River Thames is alive and healthy. Though not yet teeming with fish the salmon and trout are back.
Traffic however can be very very heavy.
Over 80 web cams covering the streets of London. The UK government Meterology Office. The latest Met Office satellite picture of Europe. Today's weather in London from the US weather source that still quotes temperatures in quaint Farenheit. The UK Automobile Association road watch.