Singer Horse McDonald performs on Pavilion rooftop

The stage of Glasgow's Pavilion Theatre has been well-trodden for more than one hundred years.

From Billy Connolly and Charlie Chaplin to the man who gave the theatre its nickname as the Devine Shrine – Scottish country and western star Sydney Devine.

But no one had sung from the rooftop until today.

While Horse McDonald has her own concert at the theatre lined up for 18 April, she was still determined to carve out her own corner of this illustrious venue.

"No-one has ever performed on the roof," she said. "So I decided I was going to be the first."

But the performance wasn't without its challenges.

It required a full health and safety briefing from Trafalgar Theatre which owns the Pavilion, a steep ladder to reach the space, and a minimum of six people there which meant she had to give multiple performances, including one streamed live online.

One of the songs, Careful, seemed particularly apt for the setting.

But her latest single Superpower also benefited from the rooftop location on Renfield Street.

"It feels symbolic," she said. "It's a song about resilience, strength and self-belief.

"I can't think of a better place to sing it than high above the city that has always supported me."

A further challenge was the blazing sunshine which - combined with the asphalt roofing and Horse's black suit - meant iced water in plastic tumblers was a necessity.

"If I was to tell my teenage self that I'd be doing this, the one that got off the train at Central Station under the Irn Bru sign and walked up Renfield Street to the Apollo, she would not have believed it."

Having achieved the heady heights of a rooftop performance, cheered on by onlookers in the hotel opposite, Horse is happy to return back down to earth with a concert in the main auditorium with her full band next week.

But she's intrigued by another little quirky detail in the Pavilion's design.

Back in the early 1900s when it first opened as a music hall, the theatre had a roof panel which could be manually pushed to one side to allow the fug of audience smoke to disperse.

In the 1970s, it was replaced with an electrically-controlled panel which can be slid across for ventilation.

It has since fallen out of use, and proved to be too expensive to repair.

But after today's performance Horse McDonald believes anything is possible. The sky's the limit.