The Great Fen Project aims to create the wetland between Huntingdon and Peterborough by obtaining land adjacent to the Holme Fen and Woodwalton Fen nature reserves.

BBC: Fry's wetland gift for his mother

Suffolk Wildlife Trust (SWT) wants 40 acres (16 hectares) of arable land to link to its existing reserve at Arger Fen near Sudbury.

BBC: Suffolk Wildlife Trust appeal to buy land for dormice