Looking down and up.

Coming back to the UK after a long overseas stay,  some things strike you as very 'odd'.  There are loads and loads of these redundant chimneys complete with their pots all over the place in London.  Why?  Are Londoners anticipating going back to the good old days of the coal fire?  

And the skies over London are crowded.  Apart from aircraft from the 5 London airports, I counted 8 vapour trails from aircraft over flying London 7 miles up.  Two new trails were being created as I watched.  Seemed as if the planes were in a race to America