Filmmaker and photographer Andy Pilsbury   and the Gaia Foundation have released " Llafur Ni ," a documentary about Pembrokeshire organic farmer Gerald Miles and his successful work, with farmer Iwan Evans Coedfadre and musician Owen Shiers , to bring Ceirch Du (black oats) back back to Wales.

Once common, black oats had become a difficult to find "lost crop" until Miles and Katie Hastings , regional coordinator for the Gaia Foundation’s UK Seed Sovereignty Programme, formed Llafur Ni, and recruited other farmers in Wales to work to bring them back.

'When Shiers first heard Miles was searching for black oats, he thought the description of the shiny grains sounded similar to a crop he had seen growing near his home in Machynlleth. The crop belonged to Evans, who Shiers knew through playing folk music. When Miles arrived in Machynlleth, for the first time in decades he saw black oats shining in the field. Hastings believes Evans was the very last farmer growing them. “We didn’t realise how rare we were,” says Evans.' Search for the holy grain: lost Welsh crops offer hope for future varieties

Welsh artist Miranda Whall visited Iwan Evans Coedfadre's farm to watch, and help, him and Owen Shiers thresh black oats, and you can hear an audio recording of that process.