Sarah Clayton was a 'brilliant friend' and 'wonderful mum'
A woman found dead at a campsite in East Sussex was "the best mum" who was "always happy", a friend has said.
Becky Sheppard paid tribute to Sarah Clayton, 21, from Yapton, near Littlehampton, who was found in a tent at a holiday park in Seaford on Sunday.
"She was the best mum, a wonderful mum, to her little girl who is five now," she said.
A 28-year-old Littlehampton man arrested on suspicion of murder has been released under investigation.
He and Ms Clayton were known to each other.
Det Ch Insp Emma Heater said a post mortem examination was inconclusive, and the cause of death could not currently be ascertained.
She said further investigations would be carried out which would take a number of weeks.
Ms Shepherd said: "When I saw the news that the body of a 21-year-old woman had been found I had this instinct. I just knew it was her."
She said: "We've known each other for eight years and have been inseparable. She was my best friend.
"I will always remember she was a real party girl... always happy."
Ms Shepherd said the two met at The Regis School in Bognor Regis, West Sussex, before Ms Clayton studied at Chichester College and worked at Butlins.
Ms Clayton's friends have also been paying tribute to her on Facebook.
Skye O'Rourke said: "She was such a funny, caring girl. She took me under her wing when I was on my own and was so, so loving. I just have no words."
Ryan Wallbridge said: "She was a harmless girl, now she's with the angels above us. RIP Sarah, we will all miss you."
Taylor Kane added: "You were such a wonderful, sweet girl."
Police were called to the holiday park just before 07:00 BST on Sunday.
Officers have continued to appeal for anyone who attended a 50th birthday at the campsite to come forward, as well as dog walkers and other passers-by.
Appealing for witnesses, Det Ch Insp Heater said no-one else was being sought in connection with the death.