GAELIC rockers Runrig are to celebrate 30 years in the music business with a one-off concert at Stirling Castle in the

summer.

More than 7000 fans are expected to crowd on to the Castle esplanade on August 23 to see the band perform their greatest hits.

A number of special guests, including Shetland fiddler Aly Bain and accordionist Phil Cunningham, will join them on stage.

Barry Wright, of Castle Concerts, the Edinburgh-based promoters, said they were delighted to be bringing Runrig back to Stirling Castle and to be involved in celebrating their 30th anniversary.

He said: ''Runrig are truly Scotland's finest musical ambassadors. Castle Concerts are delighted to be bringing Runrig to Stirling Castle as part of Stirling's celebrations in becoming a city.''

In the last 10 years, the castle has played host to many music legends, including Bob Dylan, REM and Ocean Colour Scene.

Runrig themselves played three sold-out shows there in August 1997.

Donnie Munro, the band's former lead singer in its heyday - when it performed to more than 50,000 people at Loch Lomond - said yesterday that he had no involvement in the castle gig.

The band, whose global fan base is huge, has grown from its 1973 beginnings as a ceilidh dance outfit on the Isle of Skye to being one of Scotland's greatest rock acts. It was voted third best Scottish band of all time in a recent poll.

Among their fans was Laurel Clark, one of the seven astronauts killed in the Columbia Space Shuttle disaster earlier this year.

Dr Clark, who worked for the US Navy Submarine Squadron at the Holy Loch in 1991, used one of the band's songs as a wake-up call from mission control in Houston.