Sleepless in Milton Keynes

Mistaking them for cliffs
The crows have nested
In the cracks and ledges
Of this concrete edifice.
Nine storeys up
I share their view,
Overlooking city lights
And watching traffic signals
Change. Red amber, green,
And red.
No darkness marks this night.
Bright street lights line up
On the blue below.
Ranks and files denote
The squared-off plan of roads.
They do not sleep - the crows -
But caw incessantly, gently
To each other. All night.