anchor.diff:  1,Wakefield South,E08000036,Wakefield,MTD,E05001462,
   1,Wakefield West,E08000036,Wakefield,MTD,E05001463,
   1,Walcot and Park North,E06000030,Swindon,UTA,E05008971,
  -1,Walgrave,E07000151,Daventry,DIS,E05009023,
   1,Walkden North,E08000006,Salford,MTD,E05000774,
   1,Walkden South,E08000006,Salford,MTD,E05000775,
   1,Walker,E08000021,Newcastle upon Tyne,MTD,E05001108,
  
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,Yelvertoft,E07000151,Daventry,DIS,E05009027,
  1,Yew Tree,E08000012,Liverpool,MTD,E05000915,
  1,Yewdale,E07000028,Carlisle,DIS,E05003179,
  2,"Randwick, Whiteshill and Ruscombe",E07000082,Stroud,DIS,E05010982,
  
negative.code: 1,"Crofton, Ryhill and Walton",E08000036,Wakefield,MTD,E05001448,
  1,"Greasby, Frankby and Irby",E08000015,Wirral,MTD,E05000961,
  1,"Hailey, Minster Lovell and Leafield",E07000181,West Oxfordshire,DIS,E05009366,
  1,"High Ongar, Willingale and The Rodings",E07000072,Epping Forest,DIS,E05004157,
  1,"Hitchwood, Offa and Hoo",E07000099,North Hertfordshire,DIS,E05004773,
  1,"Ingatestone, Fryerning and Mountnessing",E07000068,Brentwood,DIS,E05004076,
  