Post-it notes on London Underground designed to make you smile

If you travel by Tube, here's something to smile about. Post-it notes are popping up on London Underground with one simple aim - to make you smile.

Pictures of the notes which include messages such as: "You are much better than you believe" and "Don't you look smart", have been widely shared on Twitter and Instagram under the hashtag #commutehappy.

The online campaign aims to make the daily commutes of millions of Londoners a lot more fun, reminding us that even sheep have more freedom.

So, if you spot a post-it note that makes you smile, take a picture and don't forget the hashtag #commutehappy.