Margherita Taylor heads to the Cotswolds with a house-hunting couple who have a £550,000 budget and a dream of swapping coastal life in Southend-on-Sea, Essex, for views of rolling countryside. Along the way, Margherita visits Westonbirt, The National Arboretum where the annual arboricultural show is in full swing, and sees tree experts putting a range of impressive skills into action.