A Banksy painting titled Game Changer could fetch over £3m for the NHS at a Christie's sale.
The monochrome artwork shows a young boy clutching a figure of a masked nurse wearing a cape. The boy is playing with the 'superhero' doll while Batman and Spiderman are discarded in a bin.
The art piece was sent to Southampton general hospital in May last year, during the first phase of the pandemic along with a note thanking the frontliners.