Savernake Forest, lying between Marlborough and Hungerford, is privately-owned by the Earl of Cardigan, his son Viscount Savernake and his family Trustees. It extends to some 4,500 acres, and is the only-privately owned Forest in Britain. Much of its timber rights are leased to the Forestry Commission. Running right through the middle of the Forest is Capability Brown's 'Grand Avenue'. This avenue of beech trees - now a Private Road - was laid out in the late 1790's, and at just over 4 miles long it stands in the Guinness Book of Records as the longest Avenue in Britain.