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When Robert Marshall first walked the West Highland Way in 1993, he completed the 96-mile route in just three days - but he barely had time to take in the dramatic scenery that makes it famous.

Experts on the West Highland Way say Robert's achievement is "unparalleled".

Kenny Auld, head of visitor services at Loch Lomond and The Trossachs National Park Authority, said Robert's "unwavering commitment" to the West Highland Way was inspiring.

"To our knowledge, in the history of the National Park, an achievement like walking the West Highland Way 100 times by a single individual is unparalleled," he said.

When Robert, who has had two heart operations for an irregular heartbeat, is not walking the West Highland Way he volunteers on the path to help repair it.