anchor.diff:  http://og.decc.gov.uk/envir,,410
   http://og.decc.gov.uk/environment/,,410
   http://og.decc.gov.uk/environment/chemtrials.htm,,410
  -http://og.decc.gov.uk/environment/eiaguidancenote.pdf.,,410
  +http://og.decc.gov.uk/environment/eiaguidancenote.pdf,,410
   http://og.decc.gov.uk/environment/index.htm,,410
   http://og.decc.gov.uk/environment/index.htmdecc,,410
   http://og.decc.gov.uk/environment/ocr2002,,410
  
positive.code: http://og.decc.gov.uk/en/olgs/cms/environmental/leg_guidance/deepwater/deepwater.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/explorartionpro/field%20dev/the%20oil%20and%20ga/develop%20plans/develop%20plans.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/exploratiionpro/onshore/cuadrills_decc/cuadrill,,410
  http://og.decc.gov.uk/en/olgs/cms/explorationpro.,,410
  http://og.decc.gov.uk/en/olgs/cms/explorationpro/,,410
  http://og.decc.gov.uk/en/olgs/cms/explorationpro/decommisionin/table/,,410
  http://og.decc.gov.uk/en/olgs/cms/explorationpro/decommissionin/,,410
  
negative.code: http://og.decc.gov.uk/en/olgs/cms/privacy_cookie/privacy_cookie.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/tech_papers/conf_papers/conf_/,,410
  http://og.decc.gov.uk/en/olgs/cms/tech_papers/conf_papers/conf_papers.aspx,http://tools.decc.gov.uk/en/content/cms/tools/conf_papers/conf_papers.aspx,301
  http://og.decc.gov.uk/en/olgs/cms/tech_papers/conf_papers/heavy_oil_gif/heavy_oil_gif.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/tech_papers/conf_papers/image1/image1.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/tech_papers/conf_papers/lcretmf_gif/lcretmf_gif.aspx,,410
  