Tartan: everything you wanted to know

We're all familiar with the checks and stripes of tartan. But, how much do you know about the colourful history of the textile famously sported by the Scottish clans? According to historian and tartan expert Peter MacDonald, some of our favourite 'facts' surrounding the chequered material might not be as accurate as we think. Speaking to Emily Briffett, and answering listener questions, Peter charts tartan's long story - from its early origins, to its growing status as a national symbol and commercial icon.