To the best of my knowledge David Wishart is Scots, so I was pleased with myself when my subconscious parsed the 'porkies', that people often tell Marcus Corvinus, as cockney rhyming slang: pork pies = lies. I still figured 'the whole boiling' for a Caledonianism until my subconscious suggested 'boiling pot = lot.' Ah well. It would appear to be impossible for an outsider to learn all the cockney rhymes available.