The cherry-sized fruit was created in response to increased demand for novelty produce, said Marks & Spencer.
Called the tiger tomato, it has magenta-coloured flesh and is slightly sweeter than standard varieties. The tomatoes were grown in Lancashire and the Isle of Wight.
British Tomato Growers Association chairman Gerry Hayman said: "There is a continuing demand for novelty and variety tomatoes. The different shapes and sizes of speciality products make them popular as they are distinctive."
M&S is also launching an even sweeter-tasting variety called the "strawmato" which it says goes well with melted chocolate. Tiger tomatoes cost STG1.99 (A$4.80) for 275g.