It is harvest time, and the countryside is buzzing with activity. The Countryfile team are getting stuck in as crops are brought in across the country. Matt Baker visits the Gaddesden Estate to discover how the harvest here has changed over the years. Anita Rani picks peppermint and concocts cocktails. John Craven is meeting a group of 'nutters' to gather in the cobnut harvest ready for a nutty feast. Joe Crowley investigates the farm brands on sale in supermarkets and asks when is a farm not a farm. Countryfile also plays host to the fortieth anniversary of One Man and His Dog, as England, Wales, Ireland and Scotland send their best shepherds and their dogs to compete for the trophy, and Adam has been meeting the teams to see how they are preparing. This week he is travelling to Wales and Ireland to meet the competitors and their dogs hoping to be crowned champions.