A London cyclist has today posted a shocking video to YouTube showing the moment a rider overtaking a man riding a Santander Cycles hire bike clipped the other cyclist's shoulder, almost sending him into the path of a lorry.

Uploaded with the title "Cyclist MGIF" - the acronym stands for "Must Get In Front" - the video shows one of the most frightening near-misses we've ever seen, and serves as a sobering reminder of why you should allow fellow cyclists space when overtaking.

The incident happened beneath Grosvenor Bridge - also known as the Victoria Railway Bridge - on the north bank of the Thames, on Cycle Superhighway 8 which runs from Wandsworth to Westminster.