Hello from London. Weather has been chilly, with temps ranging from 5 to 8 c. Think gloves and scarves. However, you can always tell London women as they will be the short skirts and the knee length boots with the spikey heels. I forgot how much skin they like to show. Also in fashion are fur hats(like Russians) and black coats with scarves. I, in my flats and rainproof coat stand out like a sore thumb:)
Of course being March, about half the tourists are high school/college students from around the world and half of those are Americans:) Sometimes, in S. Kensington, it almost feels like home.
As for the exchange rate/costs- My advise is not to think about it:)Prices here cost the same in £'s as they would in dollars. Add to that an exchange rate at $1.94/GBP(my flat is near a currency exchange) and London can be very expensive.
If here for 6 or more days, buy a 7-day Oystercard for £23.00.
After commuting on the DC Metro, riding the Tubes seems quicker(less waiting), except at rush hour, where I've perfected my sardine role. Since the congestion charge extended to Kensington, the buses and traffic travel time seem quicker than before.
At every museum, there must be a minimum of 1-2 school groups there with you, blocking your view:)
Will write more when I return.