anchor.diff:  http://og.decc.gov.uk/wons/wdep0100.qrywell,,410
   http://og.decc.gov.uk/xhtml1/,,410
   https://og.decc.gov.uk/EIP.htm,https://tools.og.decc.gov.uk/EIP.htm,301
  -https://og.decc.gov.uk/fields/field_partners.txt,https://www.gov.uk/oil-and-gas-fields-and-field-development,301
  -https://og.decc.gov.uk/pprs/report1.xls,https://www.gov.uk/oil-and-gas-petroleum-operations-notices,301
  
positive.code: http://og.decc.gov.uk/en/olgs/cms/enviroment/permits_stats.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/environment//leg_guidance/onshore/onshore.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/about_the_o/,,410
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/about_the_offs.aspx,https://www.gov.uk/government/policies/providing-regulation-and-licensing-of-energy-industries-and-infrastructure/supporting-pages/environmental-regulation-of-offshore-oil-gas-activities,301
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/aerial/aerial.aspx,https://www.gov.uk/government/policies/providing-regulation-and-licensing-of-energy-industries-and-infrastructure/supporting-pages/environmental-regulation-of-offshore-oil-gas-activities,301
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/aerial/baoac/baoac.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/elgin_gig/elgin_gig.aspx,,410
  http://og.decc.gov.uk/en/olgs/cms/environment/about_the_offs/enviro_inspect/2006/2006.aspx,,410
  
negative.code: http://og.decc.gov.uk/information/bb_updates/appendices/fields/wytchfrm.htm,,410
  http://og.decc.gov.uk/information/bb_updates/appendices/fields_index.htm,,410
  http://og.decc.gov.uk/information/bb_updates/chapters/,,410
  http://og.decc.gov.uk/information/bb_updates/chapters/chart4_5.gif,,410
  http://og.decc.gov.uk/information/bb_updates/chapters/charts2_4-2_8.htm,,410
  http://og.decc.gov.uk/information/bb_updates/chapters/reserves_index.htm.,,410
  