Ahead of Friday’s big opening Banksy has produced two ingenious sporting stencils. They appear on his website but their locations remain a mystery.

One depicts a javelin thrower launching a missile and is reminiscent of his famous flower bomb. The other is a striking portrait of a pole-vaulter catapulting himself over a broken barbed wire fence and a filthy abandoned mattress.

There has been much anticipation over whether Banksy would produce work with a sporting theme this week and now we are excited to see whether these two are the beginning of a series of similar works from this British talent.