Joe Crowley is on his home turf in north London, exploring the wonderful Lea Valley. He pays a visit to one of the UK’s biggest salad growers to see how Covid-19 is affecting them. He also heads to the mysterious gunpowder mills, its overgrown ruins a testament to past battles. As it is International Dawn Chorus Day, bird expert Adrian Thomas will be telling us what to listen out for. We hear from Hannah Jackson, the Red Shepherdess, about how she’s coping with the pandemic, and it is a race against time for Adam as he goes flat out to get his spring barley in.