He graduated from the University of Glasgow in Scottish Language and Literature, and gained a PhD in Scots language from the University of Aberdeen in 1998.
Since 2007, he has been the Gaelic-speaking MSP for the Na h-Eilean an Iar constituency, and served from 2011 to 2018 as a Minister in the Scottish Government.
Tweed rins tae the Ocean follows an east to west coast walk by Allan and some friends, and gently explores the history, literature and language of what Allan
contends is the oldest national land border in the world. The title of the book takes its inspiration from the Burns song, 'Such a Parcel of Rogues in a Nation'.