A collaborative folk single has been recorded and will be released to mark the centenary of the First World War's Battle of Festubert, with all proceeds going to Scotland's veterans' charity Erskine.

Our Heroes written by musician Gary Innes of Scottish folk rock band Mànran, is to be released for download on May 18.

All funds are being donated towards caring for veterans in Erskine's five care homes in Scotland.

The single features members of Mànran, Treacherous Orchestra, Skerryvore, Rura and the Red Hot Chilli Pipers alongside Phil Cunningham, Julie Fowlis, Duncan Chisholm, Scott Wood and Siobhan Miller.

The track even includes a cameo appearance from Hughie Innes, Gary Innes' father.

The arrangement includes the voice of Iain Anderson who is heard reciting selected passages from a World War I poem written by Sir Owen Seaman.

Award winning piper Duncan MacGillivray plays on a set of World War I bagpipes that belonged to a relative, Lance Corporal Donald Paterson of the 4th Cameron Highlanders.

The charity single will be released 100 years to the day that 23-year-old Lance Corporal Paterson fell, alongside 17,000 allied soldiers at the Battle of Festubert - part of the second Battle of Artois.

Innes said: "I originally wrote 'Our Heroes' a couple of years ago to commemorate the war, performing it as part of a show called 'Shinty's Heroes'.

"I felt it was really important to remember the fallen at Festubert 100 years on.

"So many Highlanders lost their lives in this 10 day battle and coming from the Highlands myself I wanted to mark the anniversary in some way."