This is one of the very rarest and most sought after of all the Banksy stickers. Perhaps rarer than the XL version of this sticker.

The Keep Left sticker uses Banksy's 'Love Is In The Air' or 'Flower Thrower' image which is one of Banksy's most popular artworks.

The sticker measures 10.5cms X 15cms and is in excellent condition. Remarkable for an almost 25 year old sticker.

The first two photographs are of the actual sticker for sale.
I've also added a screenshot from the now closed down Pictures On Walls website where most of Banksy's stickers originated.
This sticker is indeed a 100% legit Banksy item.
Looking at the back of Banksy stickers is by far the best way to check authenticity. Please do your homework before buying any Banksy artwork.

Please check out my other listings as I'm sadly selling a lot of my Banksy sticker collection.

If you have any questions please don't hesitate to ask.

This bundle also comes with a sticker from Dface Space Invader or Shepard Fairey aka Obey Giant.