I was sent a link to this website, this paragraph caught my eye



"Very little information has been found about this college, apart from
the fact that it provided wireless telegraph training and that Sir James Redmond, Director of Engineering for the BBC 1968-79, studied there
early in his career. The company owning the college was closed in June
1948 according to an entry in the Edinburgh Gazette."

https://www.lothiansradiosociety.com/lrs-archive/384-edinburgh-radio-history-2-wireless-colleges

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