So if you go on Banksy's website now, this is what you'll see.
If you click on the image, you see these two figures up close.
Updated – April 15, 2.37 p.m. BST: The image has been found!
It's in Clement Street, in Bristol.
You can find it here.
Yesterday The Gloucestershire Echo reported that this image had appeared on the side of a house in Cheltenham.
Karren Smith, 48, the house's owner, said she saw men packing a white tarpaulin into a van at about 7.30am on Sunday.
The work can be seen on the corner of Fairview Road and Hewlett Road.
