A teenage schoolgirl collapsed and died while revising for her GCSE exams.
Arabella Campbell, 16, died after suffering suspected sudden heart failure at home in Beckenham, south London, on Sunday night.
Her uncle, Robert Northcott told the Evening Standard: "She was a much loved vivacious, kind and clever girl at the heart of her close knit family.
"After a happy family day last Sunday at home with her mother, grandmother and cousins she settled down to revise for her GCSE exams beginning this week.
"She was found at 10pm lying on top of her bed surrounded by papers and books.
"When her mum went to say good night 30 minutes later Arabella was simply gone – not breathing, lips blue.
"Paramedics came very quickly but her heart had simply stopped."
Police, who are treating the death as unexplained, said there was nothing to suggest anything suspicious about the circumstances.
Mr Northcott added: "She was looking forward to Sixth Form and had a great appetite for life especially with her little cousins. We will carry her in our hearts forever more."
Staff and pupils at Langley Park School for Girls, in Beckenham were told about the 16-year-old's death on Monday.
A Metropolitan Police spokesman said a post-mortem examination is set to take place within days.
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