It features one child looking ahead as though out to sea, another child behind looking over their shoulder, and a third child at the back of the boat appearing to be leaning over the side holding a bucket.
Writing above the artwork says: “We’re all in the same boat.”
The metal part of the artwork has since been removed, and pictures show a man in fluorescent overalls appearing to drag it way.
He also worked on a statue in King’s Lynn, putting an ice cream in its hand while making a tongue appear from its mouth.
The artist confirmed another work spotted on a wall outside the former Lowestoft Electrical shop on London Road North, which appears to show a child next to a sandcastle.
A slab next to the sandcastle seems to have been raised from the pavement and is sitting out of place next to where it appears it should be.
He also depicted a musician playing an instrument above a bus stop, while two people dance beside him.
Banksy also wrote “Go Big Or Go Home” on the side of a small building in Merrivale Model Village.
Earlier this year, Banksy raised more than £16 million for health projects with the auction of a painting offering an “image of hope”.
Game Changer appeared at Southampton Hospital during the first wave of the pandemic.
The anonymous graffiti artist auctioned the original canvas, with the reproduction of the work remaining in the hospital.
The painting fetched £16.7 million, which is a world auction record for the artist, according to Christie’s.