Animal rights activists attacked a recently unveiled King Charles III portrait at the National Gallery in London.

The rabble-rousers from the group Animal Rising pasted an image of the character Wallace from the animated series 'Wallace and Gromit' over the king's visage on June 11.

Accompanying the alteration was a speech bubble saying: 'No cheese Gromit, look at all this cruelty on RSPCA farms!'

Animal Rising claimed responsibility for the attack, citing concerns over the RSPCA Assured label attached to certain food products, alleging lapses in animal welfare standards.

The group's recent investigation into farms carrying the certification allegedly revealed instances of poor animal welfare, prompting calls for King Charles to reassess his patronage of the RSPCA charity.

Crafted by British artist Jonathan Yeo, the portrait had been unveiled just last month at London's Philip Mould Gallery. While some praised its artistic merit, others criticised its depiction of King Charles III against a fiery red backdrop, with some likening it to the monarch 'bathing in blood' or emerging from the fiery pits of hell.

Conspiracy theorists even claimed that an image of Beelzebub was hidden in the background.