Spot the odd one out.
You must justify your answer.
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A for Gardner, C for Highlanders, A for Peron, ?, I for the engine, R for Daley. So the odd one out is probably the fourth (though I can't identify it). Update: Mohirl (thanks!) tells me the fourth is Gareth Hunt. He's used for Cockney rhyming slang rather than Cockney alphabet so is, in fact, the odd one out.