Human rights group Sanctuary International say they will fight any moves to have a Tibetan asylum seeker deported.
Mr Yeti, 46, a lecturer at Kings College and the only living example of the legendary 'abominable snowman' ever recorded, is accused of council tax and housing benefit fraud and of being unfairly critical of the Miles Davis album Blue Moods in his review for the East Acton Gazette.
A spokesperson for Sanctuary explained that Mr Yeti is being singled out because of his status as a missing link between humans and apes and is not being granted fair or equitable treatment by UK immigration authorities.
They have handed a petition with the names of both their UK members to the prime minister who has said: "I have also been mistaken for a missing link between humans and plankton, and I can fully appreciate and sympathise with Mr Yeti for his situation."
Related story: Abominable Snowman claims asylum
