Lewis Capaldi makes surprise return to stage as he crashes The Vamps gig after he cancelled tour amid his Tourette's struggles

Lewis Capaldi surprised gig-goers at The Vamps show on Wednesday when he unexpectedly crashed the show. 

The singer, 26, is currently taking a break from touring as he focuses on his mental and physical health amid his persistent struggles with his Tourette's symptoms. 

Yet he made a surprise return to the stage to support his fellow musicians, running on during The Vamps' Kew the Music show and hugging frontman Brad Simpson onstage.

Fans of the boy band - also comprising Connor Ball, Tristan Evans and James McVey - were left screaming hysterically as Lewis came out during their performance of Risk Of It All and grabbed Brad's microphone before he appeared to sing, though he could not be heard over the animated audience.

Lewis is a fan of The Vamps and previously shocked the group by walking up to them at an afterparty and began singing the lyrics to one of their lesser-known album tracks.

Here he is! Lewis Capaldi surprised gig-goers at The Vamps show on Wednesday when he unexpectedly crashed the show

Here he is! Lewis Capaldi surprised gig-goers at The Vamps show on Wednesday when he unexpectedly crashed the show

Connor told the Celebrity Search Engine podcast: 'We were at this afterparty with Lewis Capaldi and we were just chatting with him. 

'We were just having a normal conversation and then, out of nowhere, he started screaming in mine and Brad's ears this album track, off our first album. So like, not even a single, he just loves the song!'

The Scotsman announced last month that all upcoming 24 shows for his Broken by Desire to Be Heavenly Sent tour had been axed, just days after he struggled to finish his headline set at Glastonbury.

The singer took to social media to say it was 'obvious' he needed to spend 'much more time getting my mental and physical health in order', branding the decision 'the most difficult of my life'.

He shared:  'Hello everyone. First of all thank you to Glastonbury for having me, for singing along when I needed it and for all the amazing messages afterwards. It really does mean the world,' he began.

'The fact that this probably won't come as a surprise doesn't make it any easier to write, bit I'm very sorry to let you know I'm going to be taking a break from touring for the foreseeable future.

'I used to be able to enjoy every second of shows like this and I'd hoped 3 weeks away would sort me out. 

'But the truth is I'm still learning to adjust to the the impact of my Tourette's and on Saturday it became obvious that I need to spend much more time getting my mental and physical health in order, so I can keep doing everything I love for a long time to come.

Here he is: Lewis made a surprise return to the stage to support his fellow musicians, running on during The Vamps' Kew the Music show and hugging frontman Brad Simpson onstage

Here he is: Lewis made a surprise return to the stage to support his fellow musicians, running on during The Vamps' Kew the Music show and hugging frontman Brad Simpson onstage

Loving it: Lewis is a superfan of The Vamps (L-R Tristan Evans, Singer Bradley Simpson, Connor Ball and James McVey)

Loving it: Lewis is a superfan of The Vamps (L-R Tristan Evans, Singer Bradley Simpson, Connor Ball and James McVey)

'I know I'm incredibly fortunate to be able to take some time out when others can't and I'd like to thank my amazing family, friends, team, medical professionals and all of you who've been so supportive every step of the way through the good times and even more during this past year when I've needed it more than ever.

'I'm so incredibly sorry to everyone who had planned to come to a show before the end of the year but I need to feel well to perform at the standard you all deserve. 

'Playing for you every night is all I've ever dreamed of so this has been the most difficult decision of my life. I'll be back as soon as I possible can. All my love always, Lewis.'

Tourette's experts told MailOnline it was not possible to know when Lewis would be back performing because every individual has different treatment needs.

They also praised his 'courage' in 'openly addressing his condition', labelling it 'an inspiration' to many other sufferers - but warned his recovery cannot be rushed.

Lewis had already taken three weeks off before his gig on the Pyramid Stage at Glastonbury, but today admitted it was not enough and that he was 'still learning to adjust to the impact of my Tourette's'.

The performer became emotional as he started losing his voice during the performance, prompting him to apologise to the crowds - who then helped him finish his songs in heartwarming footage that quickly went viral.

Struggles: Lewis struggled to finish his headline set at Glastonbury due to his Tourette's syndrome symptoms (pictured on stage at Glastonbury last month)

Struggles: Lewis struggled to finish his headline set at Glastonbury due to his Tourette's syndrome symptoms (pictured on stage at Glastonbury last month)

Lewis Capaldi makes surprise return to stage as he crashes The Vamps gig