Catfish And The Bottlemen and Bastille are among the bands performing at the second day of Scotland’s biggest music festival on Saturday.

Around 50,000 music fans are expected to attend each day at the TRNSMT festival which takes place on Glasgow Green from July 12-14.

The event kicked off on Friday with performances from acts including Mabel, Years And Years, Gerry Cinnamon and headliner Stormzy.

There was uncertainty over the rapper’s appearance after his flight was delayed for two hours on Friday.

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Mabel was among those performing at the TRNSMT festival on Friday (Lesley Martin/PA)

However he arrived in time to perform after being given a police escort to Glasgow Green.

He posted a video on his Instagram stories of his vehicle being escorted to the festival site by police motorcycles, joking that he is “going up in the world” and is like “the Queen”.

Appearing on stage around 15 minutes later than scheduled to close the first day of the festival, he told fans: “We’re going to have a legendary night.

“I don’t ever want to forget this.

“This is my first time headlining a festival in Scotland so I want to make it unforgettable.”

Opening with Know Me From, he played new single Crown and and also covered Someone You Loved by Lewis Capaldi, who is due to appear at the festival on Sunday.

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Stormzy posted a video of his police escort to the festival on his Instagram account (@stormzy/Instagram/PA)

He tweeted about the experience on Saturday, saying: “Still on cloud 9 from last nights performance thank you Glasgow I appreciate you guys thank you for the love, last night was beautiful.”

Lauren Spiteri, niece of Texas star Sharleen Spiteri, headlined at the women-only Queen Tut’s stage on Friday.

She said: “I’m just excited to be part of it, I think it’s really nice that TRNSMT are celebrating women in music that my be overlooked and that are just doing it on their own and I’m very proud to be sharing a stage with these amazing women.”

On Saturday Catfish and the Bottlemen will headline on the main stage while Richard Ashcroft, Sigrid and Sundara Karma are also in the line-up.

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Stormzy headlined at the festival on Friday (Lesley Martin/PA)

George Ezra will headline on Sunday to bring the festival to a close.

Snow Patrol and Jess Glynne were in the original line-up but were replaced by Scottish artists Lewis Capaldi and Emeli Sande after pulling out in the weeks before the festival.

The weather is expected to be generally fine over the weekend with a few showery spells possible on Saturday and a bright sunny day on Sunday.

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Crowds enjoyed the sunshine on Friday (Lesley Martin/PA)

Festival-goers would be wise to take sun-cream as temperatures could reach 21C (69.8F) on Saturday and 23C (73.4F) on Sunday, forecasters said.

Crowds basked in the sunshine on Friday with temperatures topping 20C (68F).

Organisers said by 5.30pm Friday, 130 people had visited medical staff on site for minor ailments, many sun-related.

Police said 13 people were arrested at the festival on Friday.