anchor.diff:  http://www.number10.gov.uk/policy/transport-dfe,https://www.gov.uk/government/organisations/department-for-transport,301
   http://www.number10.gov.uk/policy/work-and-pensions,https://www.gov.uk/government/organisations/department-for-work-pensions,301
   http://www.number10.gov.uk/policy/work-and-pensions-dwp,https://www.gov.uk/government/organisations/department-for-work-pensions,301
  -http://www.number10.gov.uk/privacy-policy,,410
  +http://www.number10.gov.uk/privacy-policy,https://www.gov.uk/support/privacy-policy,301
   http://www.number10.gov.uk/problemwithprocurement,,410
   http://www.number10.gov.uk/public-service-reform-cornwall-works,,410
   http://www.number10.gov.uk/queens-speech/2010/05/queens-speech-afghanistan-and-pakistan-50704,,410
   http://www.number10.gov.uk/rss-feed,https://www.gov.uk/government/organisations/the-prime-ministers-office-number-10,301
   http://www.number10.gov.uk/sir-robert-peel,,410
   http://www.number10.gov.uk/sir-robert-walpole,,410
  -http://www.number10.gov.uk/site-map,,410
  +http://www.number10.gov.uk/site-map,https://www.gov.uk/,301
   http://www.number10.gov.uk/stat-attack,,410
  -http://www.number10.gov.uk/subject/afghanistan,https://www.gov.uk/government/announcements?keywords=&announcement_type_option=news-stories&topics%5B%5D=all&departments%5B%5D=prime-ministers-office-10-downing-street,301
  +http://www.number10.gov.uk/subject/afghanistan,https://www.gov.uk/government/world/afghanistan,301
   http://www.number10.gov.uk/subject/afghanistan/page/10,,410
   http://www.number10.gov.uk/subject/afghanistan/page/12,,410
   http://www.number10.gov.uk/subject/afghanistan/page/2,,410
  
positive.code: http://www.number10.gov.uk/subject/crime-and-policing/page/7,,410
  http://www.number10.gov.uk/subject/crime-and-policing/page/8,,410
  http://www.number10.gov.uk/subject/crime-and-policing/page/9,,410
  http://www.number10.gov.uk/subject/culture,https://www.gov.uk/government/announcements?keywords=&announcement_type_option=news-stories&topics%5B%5D=all&departments%5B%5D=prime-ministers-office-10-downing-street,301
  http://www.number10.gov.uk/subject/culture/page/1,,410
  http://www.number10.gov.uk/subject/culture/page/2,,410
  http://www.number10.gov.uk/subject/culture/page/3,,410
  
negative.code: http://www.number10.gov.uk/_prime-ministers-questions,,410
  http://www.number10.gov.uk/_speeches-and-transcripts,https://www.gov.uk/government/announcements?keywords=&announcement_type_option=speeches&topics%5B%5D=all&departments%5B%5D=prime-ministers-office-10-downing-street,301
  http://www.number10.gov.uk/_statements-and-articles,,410
  http://www.number10.gov.uk/accessibility,https://www.gov.uk/support/accessibility,301
  http://www.number10.gov.uk/afghanistan,https://www.gov.uk/government/policies/establishing-stability-in-afghanistan,301
  http://www.number10.gov.uk/asquith-speaks-on-the-budget-transcript,,410
  http://www.number10.gov.uk/big-society-awards-nomination-form,,410
  