The loved ones of a teenager who died at a festival following a 'severe medical emergency' have paid tribute to the 'caring, funny, clever' young woman.

Lucy Halpin, 18, attended the Tonnau festival in North Wales last Saturday but was rushed to hospital following the unspecified medical emergency, where she later died.

It is unclear what caused her death, with police treating it at the time as unexpected.

Ms Halpin's sister, Jessica Mariee, shared a message of her devastation, confirming in a tribute that the teen died just a few weeks following her 18th birthday.

Tonnau festival, an independent music and arts festival aimed at families, said paramedics, who arrived around 1.45am on July 11, did 'everything they could' to treat Ms Halpin.

The event, held annually on the Carreglwyd Estate near Llanfaethlu on Anglesey and featuring international bands and DJs alongside culture, food and drink, later closed and attendees were asked to leave the site following the teenager's death.

Ms Halpin's friends have launched a GoFundMe to help support her family during this period, with donations also towards giving 'her the best send-off she deserves️'.

Meanwhile, Ms Halpin's workplace, Breeze Hill Bar, Eatery \& Hotel, shared their condolences, writing that they are 'a broken pub full of broken hearts'.

Lucy Halpin, 18, attended the Tonnau festival in North Wales last Saturday but was rushed to hospital following the unspecified medical emergency, where she later died

Ms Halpin's workplace described her as 'caring, funny, clever and always smiling'

It described the 'wonderful' Ms Halpin as 'caring, funny, clever and always smiling', as well as being a 'treasured' 'member of our extended family'.

It added: 'Lucy was exceptionally good at looking after our customers, many of whom will miss her lots.

'Our thoughts are very much with Lucy’s family and friends.

'Lots of her closest friends have visited The Breeze this last week and their pain and sorrow is clear to see. Lucy was like a glue between them, a magical bond.'

In a statement immediately following Ms Halpin's death, the event's organisers said: 'Everyone at Tonnau Festival is deeply saddened to confirm that a festival attendee tragically passed away in the early hours of Saturday morning following a severe medical emergency.

'Our thoughts and deepest condolences are with the attendee's family and friends during this incredibly difficult time.

'​From the moment the attendee became unwell, our on-site welfare teams, security, and emergency medical staff responded immediately.

'Paramedics and welfare personnel did everything they could to provide emergency care, but unfortunately they later died in hospital.

'​The safety and well-being of our audience is always our highest priority. Following this tragedy, and to allow emergency services and local authorities to conduct their necessary work, we made the decision to close the remainder of the festival and have asked people to vacate the site when it is safe for them to do so.'

They added the festival was cooperating 'fully' with the police investigation and added: 'Our thoughts and hearts are with the family.'

North Wales Police said emergency services arrived at the festival early on Saturday morning 'following reports of a medical emergency'.

'Despite the best efforts of the emergency services, sadly, the 18-year-old woman later died in hospital.

'The death is being treated as unexpected whilst investigations are ongoing and the coroner has been informed.'

Detective Inspector Iolo Edwards said: 'Our thoughts remain with the woman's family and loved ones at this difficult time.

'We urge members of the public not to speculate on the circumstances of the death, and anybody with information that could assist our enquiries should contact us via our website or by calling 101.'