We lived in the UK for a very long time, but somehow up till this year I never did any night time photography in London. So I don't know if summer London is always such a delight to photograph, or was it because of the Olympics. Doesn't really matter. Buildings and structures that might look dull and grey during the day, at night transform completely.
Not that the Tower Bridge looks dull during the day, but some of the office buildings an the pics below do.