LISTENERS to the BBC's Westminster Hour last night may have been surprised to hear SNP MP Ian Blackford breaking into song.

The Ross, Skye & Lochaber MP was asked to share his favourite protest song during the Sunday evening politics show. He then sang a short song about Polaris submarines on the Holy Loch in the 1960s.

 The Polaris programme gave the UK its first submarine-based nuclear weapons system. It ran from 1968 to 1996.