anchor.diff:  1,Staple Tye,E07000073,Harlow,DIS,E05004187,
   1,Sumners and Kingsmoor,E07000073,Harlow,DIS,E05004188,
   1,Toddbrook,E07000073,Harlow,DIS,E05004189,
  -3,Downhall and Rawreth,E07000075,Rochford,DIS,E05004209,n
  -3,Hawkwell West,E07000075,Rochford,DIS,E05004214,n
  -3,Hullbridge,E07000075,Rochford,DIS,E05004218,n
  -3,Lodge,E07000075,Rochford,DIS,E05004219,n
  -3,Trinity,E07000075,Rochford,DIS,E05004223,n
  -3,Wheatley,E07000075,Rochford,DIS,E05004224,n
   1,All Saints,E07000078,Cheltenham,DIS,E05004288,
   1,Battledown,E07000078,Cheltenham,DIS,E05004289,
   1,Benhall and The Reddings,E07000078,Cheltenham,DIS,E05004290,
  
positive.code: 1,Tarleton,E07000127,West Lancashire,DIS,E05005377,
  1,Up Holland,E07000127,West Lancashire,DIS,E05005378,
  1,Wrightington,E07000127,West Lancashire,DIS,E05005379,
  3,Abbey,E07000138,Lincoln,DIS,E05005607,n
  3,Birchwood,E07000138,Lincoln,DIS,E05005608,n
  3,Boultham,E07000138,Lincoln,DIS,E05005609,n
  3,Carholme,E07000138,Lincoln,DIS,E05005611,n
  3,Castle,E07000138,Lincoln,DIS,E05005612,n
  3,Glebe,E07000138,Lincoln,DIS,E05005613,n
  3,Hartsholme,E07000138,Lincoln,DIS,E05005614,n
  3,Minster,E07000138,Lincoln,DIS,E05005615,n
  3,Moorland,E07000138,Lincoln,DIS,E05005616,n
  3,Park,E07000138,Lincoln,DIS,E05005617,n
  1,Bradwell North,E07000145,Great Yarmouth,DIS,E05005784,
  1,Bradwell South and Hopton,E07000145,Great Yarmouth,DIS,E05005785,
  1,Central and Northgate,E07000145,Great Yarmouth,DIS,E05005788,
  
negative.code: 1,Spofforth with Lower Wharfedale,E07000165,Harrogate,DIS,E05006267,
  1,Washburn,E07000165,Harrogate,DIS,E05006270,
  1,Wathvale,E07000165,Harrogate,DIS,E05006271,
  1,Barton and Sandhills,E07000178,Oxford,DIS,E05006545,
  1,Blackbird Leys,E07000178,Oxford,DIS,E05006546,
  1,Carfax,E07000178,Oxford,DIS,E05006547,
  