anchor.diff:  2931 May,ComRes/Daily Mail,1000,41.0,29.0,10.0,8.0,5.0,5.0,3.0,12.0,2015
   2526 May,YouGov/The Sun,1709,41.0,30.0,13.0,7.0,4.0,4.0,1.0,11.0,2015
   89 May,Survation/Mail on Sunday,1027,40.0,31.0,12.0,6.0,5.0,3.0,2.0,9.0,2015
  -7 May,General Election results (GB only)[2][3],29980107,37.8,31.2,12.9,8.1,4.9,3.8,1.4,6.6,2015
  +7 May,General Election results (GB only)[4][5],29980107,37.8,31.2,12.9,8.1,4.9,3.8,1.4,6.6,2015
  
positive.code: "Date(s)
  conducted",Polling organisation/client,Sample size,Con,Lab,UKIP,Lib Dem,SNP,Green,Others,Lead,Year
  30 May1 Jun,Ipsos MORI/Evening Standard,1046,45.0,40.0,2.0,7.0,3.0,2.0,,5.0,2017
  26 May1 Jun,Panelbase,1224,44.0,36.0,5.0,7.0,5.0,2.0,1.0,8.0,2017
  26 May1 Jun,YouGov[b],53000,42.0,38.0,3.0,9.0,4.0,2.0,1.0,4.0,2017
  3031 May,YouGov/The Times,1875,42.0,39.0,4.0,7.0,4.0,2.0,1.0,3.0,2017
  2531 May,YouGov[b],53611,42.0,38.0,3.0,9.0,4.0,2.0,2.0,4.0,2017
  2530 May,Kantar Public,1199,43.0,33.0,4.0,11.0,4.0,3.0,1.0,10.0,2017
  2430 May,YouGov[b],53464,41.0,38.0,4.0,9.0,4.0,2.0,2.0,3.0,2017
  2629 May,ICM/The Guardian,2002,45.0,33.0,5.0,8.0,4.0,3.0,2.0,12.0,2017
  2627 May,Survation/Good Morning Britain,1009,43.0,37.0,4.0,8.0,2.0,1.0,4.0,6.0,2017
  2526 May,YouGov/Sunday Times,2003,43.0,36.0,4.0,9.0,4.0,2.0,1.0,7.0,2017
  2426 May,ICM/The Sun on Sunday,2044,46.0,32.0,5.0,8.0,4.0,2.0,1.0,14.0,2017
  2426 May,"ComRes/Sunday Mirror, Independent on Sunday",2024,46.0,34.0,5.0,8.0,4.0,2.0,1.0,12.0,2017
  
negative.code: 1923 May,Panelbase/The Sunday Times,1019,48.0,33.0,4.0,7.0,5.0,2.0,1.0,15.0,2017
  1822 May,Kantar Public,1200,42.0,34.0,4.0,9.0,4.0,4.0,2.0,8.0,2017
  1921 May,ICM/The Guardian,2004,47.0,33.0,4.0,9.0,4.0,2.0,1.0,14.0,2017
  1920 May,Survation/Good Morning Britain[b],1034,43.0,34.0,4.0,8.0,3.0,2.0,5.0,9.0,2017
  1920 May,Survation/Mail on Sunday,1017,46.0,34.0,3.0,8.0,4.0,1.0,3.0,12.0,2017
  1819 May,YouGov/Sunday Times,1925,44.0,35.0,3.0,9.0,5.0,2.0,1.0,9.0,2017
  1617 May,Opinium/Observer,2003,46.0,33.0,5.0,8.0,5.0,2.0,1.0,13.0,2017
  1617 May,YouGov/The Times,1861,45.0,32.0,6.0,8.0,5.0,2.0,1.0,13.0,2017
  