Regal Zonophone Records was a British record label formed in 1932, through a merger of the Regal and Zonophone labels. This followed the merger of those labels' respective parent companies – the Columbia Graphophone Company and the Gramophone Company – to form EMI. At the merger, those records from the Regal Records catalogue were prefixed 'MR' and those from the Zonophone Records catalogue were prefixed 'T'. Record releases after the merger continued using only the 'MR' prefix.