GREENWICH'S The O2 Arena is barely visible in the fog today, as these stunning images from the Met Police helicopter show.

News Shopper: Recognise this place? (Pic by @MPSinthesky)

The helicopter crew have been tweeting the images of London on their Twitter account today.

News Shopper: The view across London (Pic by @MPSinthesky)

Other pictures featured Canary Wharf and the Shard.