Sea change: the drive to restore millions of oysters on the Norfolk coast

The first ever mass deployment of mother reef bricks aims to rebuild habitats - and could reshape the North Sea

Allie Wharf's career unfolded amid conflict. As a senior foreign producer for Newsnight, she reported on Iraq and Afghanistan. Just two years ago, she was filming mass graves in Ukraine.

But burnt out by wars, and after a detour farming ducks in Tanzania, Wharf has now settled on the quiet north Norfolk coast. Here, alongside her life and business partner, Willie Athill, she has embarked on a different kind of mission: the creation of Europe's largest natural oyster reef.