Nature's Calendar - Series 1 - Autumn: Wetlands

A guide to the best places in Britain to see wildlife this autumn. Chris Packham is in Cambridgeshire to greet the arrival of swans on the Ouse Washes. Sanjida O'Connell visits Peatlands Park to discover the autumn colours of a Northern Ireland bog. And Janet Sumner strikes gold in a disused coal marshalling yard near Barnsley.