Inside the office on the second floor of music industry mogul Merck Mercuriadis’ off-white townhouse in the posh London neighborhood of Notting Hill, there is shit everywhere. Hundreds of vinyl records are piled in shelves, while others are stacked 20 deep on the floor. A Michell Engineering turntable worth more than $10,000 is still wrapped in plastic on a card table. There’s a mound of CDs teetering next to two signed copies of English rock singer Ian Hunter’s recent memoir, one of which will go to Morrissey, whom Mecuriadis managed for several years. An original 1969 pressing of the only…