A 40 hectare greenhouse has been given the go-ahead in Essex. It'll be the UK's second largest, and will be powered and heated by a domestic waste incinerator on the same site. The company says it will grow 28,000 tonnes of tomatoes a year, which will offset 7 percent of UK tomato imports from Southern Spain, Morocco and Holland.

We visit a farm in Gloucestershire where they incorporate trees into everything they grow. Silvohorticulture uses the trees to provide shade, wind cover, and compost.

And this week we're looking ahead to the upcoming elections in the UK. Today, what politicians are promising farmers in Scotland.

Presented by Anna Hill and produced by Sally Challoner.