Countryfile - Plant Britain Finale: As Countryfile’s Plant Britain initiative to plant three-quarters of a million trees across the UK reaches its climax, John Craven and Ellie Harrison are at the Countryfile wood in Cheshire. Planting here began just two years ago, but John and Ellie discover how the saplings are already helping nature. Ellie also checks out the positive impact trees have on the planet, from seed to deadwood. Charlotte Smith finds out how community gardens are changing lives and discovers the fascinating underground system that enables trees to talk to each other.