Oscar for ex-Cardiff Uni student Joanna Natasegara

One of the only British winners at this year's Oscars described her award for a documentary about rescue volunteers in Syria as "bittersweet".

Producer Joanna Natasegara and director Orlando von Einsiedel were behind the film White Helmets, which won the best documentary short.

Former Cardiff University student Ms Natasegara said she "wished we never had to make the film".

"So we're pleased at least they get the recognition they deserve," she said.