Carbon dating has led to the breakthrough, which proves samples of hazel charcoal, unearthed in an excavation of a wattle and timber structure on Iona 60 years ago, are from the exact period the saint lived in the Inner Hebridean monastery.

Between 27 to 29 April, Bishops Donal McKeown and Ken Good will undertake a 30-mile walk together to promote reconciliation and highlight their shared Christian heritage.

Bishop Brian McGee is the son of Irish emigrants originally from Donegal and Belfast who settled in Scotland.

Service at mediaeval abbey recalls 1,450th anniversary of St Columba's arrival on the island.