anchor.diff:  1,Weedon,E07000151,Daventry,DIS,E05009024,
   1,Weetslade,E08000022,North Tyneside,MTD,E05001133,
   1,Weetwood,E08000035,Leeds,MTD,E05001442,
  -1,Welford,E07000151,Daventry,DIS,E05009025,
   1,Wellington,E07000092,Rushmoor,DIS,E05009000,
   1,Wem Brook,E07000219,Nuneaton and Bedworth,DIS,E05007489,
   1,Wensley Fold,E06000008,Blackburn with Darwen,UTA,E05001641,
  
positive.code: 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,
  
negative.code: 1,Letchworth Wilbury,E07000099,North Hertfordshire,DIS,E05004780,
  1,Levens,E07000031,South Lakeland,DIS,E05003261,
  1,Levenshulme,E08000003,Manchester,MTD,E05000707,
  1,Linacre,E08000014,Sefton,MTD,E05000942,
  1,Lindley,E08000034,Kirklees,MTD,E05001407,
  1,Linton,E07000012,South Cambridgeshire,DIS,E05002808,
  