13 September, 2017
Louella Michie's family has given a statement to The Sun newspaper after her body was found at the edge of the festival site in Dorset on Monday.
Police would not confirm which Class A drug he was believed to have supplied.
"The 28-year-old man arrested is in addition being interviewed on suspicion of supply of a controlled drug".
However, Broughton, who was the longterm boyfriend of the deceased, was re-arrested over potentially supplying a class A drug which may have killed Miss Michie - the daughter of famous television soap actor John Michie, according to the Mail.
Her family said in a statement on Tuesday: "Our hearts are broken by this horrific tragedy".
"They appear to have taken an illegal substance but we would appreciate cautious and sensitive reporting until the facts are known".
A post-mortem examination revealed no signs of an assault on Ms Michie, although further tests were needed to establish the cause of her death, police said.
He was known to Louella. She was so very positive, so bright, so out there. "The tributes to her have been incredible".
"John and his wife Carol ask that the privacy of their family be respected at this traumatic time".
Bestival was first held in 2004 at Robin Hill on the Isle of Wight, but the four-day annual event was held at Lulworth Estate for the first time this year.
Further examinations will need to be done though to determine things like substances in her system or any other suspicious activity.
Mr Michie has two other children, Daisy, 27, a stylist, and Samuel, 26, a music video director.
He played Karl Munro in Coronation Street from 2011 to 2013, having starred as Detective Inspector Robbie Ross in drama series Taggart from 1998 to 2010.