A shortage of vets is currently affecting services across all aspects of public and private animal health and biosecurity. In 2018 the gap in the veterinary workforce was put at 11%. At a hearing yesterday in Westminster the Chief Vet, Christine Middlemiss, told the Environment Food and Rural Affairs Select Committee that that shortage had not improved.

All week we're exploring how by-products from farming can be put to use on farm or elsewhere. Today, beer and Marmite.

A virus which causes birth defects in unborn lambs has returned. Schmallenberg disease has been reported since Autumn last year, and now sheep farmers are reporting that some have lost 40% of their new-crop lambs.

Presented by Anna Hill and produced by Beatrice Fenton.