‘Our sister spent 10 years in a hellish Indonesian prison – now we’ll never see her again’

When Cath Williams thinks of her older sister Andrea Waldeck, her favourite memory stems from a warm summer evening in the Hereford countryside.

‘We were walking through a field when Andrea decided, out of nowhere, she would lie down at the top of a hill and roll all the way down. That’s the kind of person she was. Andrea loved to have fun, to make us laugh...