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: 3,Welwyn East,E07000241,Welwyn Hatfield,DIS,E05004865,
  3,Welwyn West,E07000241,Welwyn Hatfield,DIS,E05004866,
  3,Werrington,E06000031,Peterborough,UTA,E05010824,
  3,West Byfleet,E07000217,Woking,DIS,E05007456,
  3,West Ecclesfield,E08000019,Sheffield,MTD,E05010883,
  3,Westbury-on-Trym and Henleaze,E06000023,Bristol,UTA,E05010917,
  3,Weybridge Riverside,E07000207,Elmbridge,DIS,E05011088,
  
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,
  