Those parts of Dorset, Hampshire, Wiltshire, West Sussex and Surrey bounded by:

On the North by A30 from the Devon / Somerset boundary to Salisbury via Chard, Crewkerne, Yeovil, Sherborne, Shaftesbury and A36 at Wilton, A36 to junction A345 at Salisbury, A345 to Marlborough, A346, A338 to Collingbourne Ducis, A346, A342 to Andover, A343, A3093, B3400 to Whitchurch, minor road south to A34. A34, A303 to junction with A33, south of North Waltham, A33 to A34 at Abbotts Worthy. B3047, B3046 to New Cheriton, A272 to A3 at Petersfield, A3 north to Milford. On the East the A283 via Petworth, B2138, A284 to Arundel, A27, A284 to Littlehampton. On the West by the Devon boundary from the coast at Lyme Bay to the A30 west of Chard. Including the Isle of Wight and the Channel Islands.