Folk is the Schiphol of Scottish music. Eventually, every curious traveller passes through. From arena rockers to rappers, traditional music remains an undeniable source. Which is why the second word in ‘Celtic Connections’ is at least as significant as the first.

Now in its 30th year, lighting up the otherwise unpromising prospect of a Glasgow January, this year’s instalment of the roots festival features artists from all corners of the globe.