About five years ago, Sacha Imrie was working in an upmarket bottle shop and studying for the Wine and Spirit Education Trust diploma when she developed a surprising interest in cask wines.

“I was given a WSET brief to look at all the different packaging options for wine,” says Imrie. “And what could have been a very boring essay turned out to not be very boring at all, because I became really interested in the environmental benefits of bag-in-box wines.”