I thought the use of the specific word "loch" would have been clear enough, but apparently the pronunciation of that word I thought I'd heard a lot on the BBC i

I thought the use of the specific word "loch" would have been clear enough, but apparently the pronunciation of that word I thought I'd heard a lot on the BBC is not known as widely as I thought. Maybe I'm misremembering. None of the pronunciations you linked to is what I intended. See https://en.wikipedia.org/wiki/Voiceless_velar_fricative https://en.wikipedia.org/wiki/Voiceless_velar_fricative or https://en.wikipedia.org/wiki/Voiceless_uvular_fricative https://en.wikipedia.org/wiki/Voiceless_uvular_fricative , as well as https://en.wikipedia.org/wiki/Scottish_English#Phonology https://en.wikipedia.org/wiki/Scottish_English#Phonology .