The list of concerts is mostly based on the following:
Alexander Sarther's list - http://www.sarther.de/html/runrig_konzertliste.html
a list of Runrig concerts 1985-2014 provided by Paul Rutter
Martin Schröder's research of West Highland Free Press
concert list found at last.fm
concert list found at songkick.com
an archieved version of Flemming Bjerre's Runrig Pages
additional research mainly regarding the Danish concerts found in archived issues
of the music magazine Gaffa and concerts in Edinburgh found in The Edinburgh Gig Archive
finding old tickets and posters