Rooftops

My wee Lumix doesn't cope very well with diminishing light but when you add the very costly filter of a dirty upstairs window you get some interesting effects.

Now I know it's not a city skyline but for some strange reason it made this song pop into my head:

When the's 'ardly no day
Nor 'ardly no night
There's things 'alf in shadow
And 'alf way in light
On the roof tops of London
Coo, what a sight!

First one to tell me what the song is... well, I'll blow you a kiss!