This programme, originally shown earlier in the year, is available on BBC iPlayer for the next 28 days.
It describes the various landscapes of the Downs: chalk grassland; heathland; woodland; and river valleys and the plants and animals they support, through the seasons of the year.
Watch it here http://www.bbc.co.uk/iplayer/episode/b08fsbtk/south-downs-englands-mountains-green