anchor.diff:  1,Chineham,E07000084,Basingstoke and Deane,DIS,E05004438,
   1,Chipping Norton,E07000181,West Oxfordshire,DIS,E05006637,
   1,Chirton,E08000022,North Tyneside,MTD,E05001118,
  -1,Chiseldon and Lawn,E06000030,Swindon,UTA,E05008955,
   1,Chopwell and Rowlands Gill,E08000037,Gateshead,MTD,E05009313,
   1,Chorley East,E07000118,Chorley,DIS,E05005169,
   1,Chorley North East,E07000118,Chorley,DIS,E05005170,
  
positive.code: 1,Yateley East,E07000089,Hart,DIS,E05009361,
  1,Yateley West,E07000089,Hart,DIS,E05009362,
  1,Yaxley and Farcet,E07000011,Huntingdonshire,DIS,E05002790,
  1,Yew Tree,E08000012,Liverpool,MTD,E05000915,
  1,Yewdale,E07000028,Carlisle,DIS,E05003179,
  2,"Randwick, Whiteshill and Ruscombe",E07000082,Stroud,DIS,E05010982,
  
negative.code: 3,Brookmans Park and Little Heath,E07000241,Welwyn Hatfield,DIS,E05004850,
  3,Broomhill and Sharrow Vale,E08000019,Sheffield,MTD,E05010860,
  3,Burngreave,E08000019,Sheffield,MTD,E05010861,
  3,Callowland,E07000103,Watford,DIS,E05004838,
  3,Cam West,E07000082,Stroud,DIS,E05010973,
  3,Canalside,E07000217,Woking,DIS,E05010796,
  