anchor.diff:  http://www.number10.gov.uk/subject/education-2/page/2,,410
   http://www.number10.gov.uk/subject/education-2/page/3,,410
   http://www.number10.gov.uk/subject/education-2/page/4,,410
  -http://www.number10.gov.uk/subject/energy-and-climate-change,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/energy-and-climate-change,https://www.gov.uk/government/topics/climate-change,301
   http://www.number10.gov.uk/subject/energy-and-climate-change/page/2,,410
   http://www.number10.gov.uk/subject/energy-and-climate-change/page/3,,410
   http://www.number10.gov.uk/subject/energy-and-climate-change/page/4,,410
  
positive.code: http://www.number10.gov.uk/subject/foreign-affairs/page/7,,410
  http://www.number10.gov.uk/subject/foreign-affairs/page/8,,410
  http://www.number10.gov.uk/subject/foreign-affairs/page/9,,410
  http://www.number10.gov.uk/subject/g8,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/government-efficiency,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/government-transparency,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/government-transparency/page/1,,410
  http://www.number10.gov.uk/subject/government-transparency/page/10,,410
  http://www.number10.gov.uk/subject/government-transparency/page/2,,410
  
negative.code: http://www.number10.gov.uk/coalition/deputy-prime-minister-nick-clegg-biography,https://www.gov.uk/government/people/nick-clegg,301
  http://www.number10.gov.uk/communicate/petition-responses/feed,https://www.gov.uk/government/announcements.atom?announcement_type_option=news-stories&departments%5B%5D=prime-ministers-office-10-downing-street,301
  http://www.number10.gov.uk/contact-us,https://www.gov.uk/government/organisations/the-prime-ministers-office-number-10,301
  http://www.number10.gov.uk/cookies,https://www.gov.uk/support/cookies,301
  http://www.number10.gov.uk/copyright,http://www.nationalarchives.gov.uk/doc/open-government-licence/,301
  http://www.number10.gov.uk/downings-street,,410
  http://www.number10.gov.uk/duke-of-devonshire,,410
  http://www.number10.gov.uk/duke-of-grafton,,410
  http://www.number10.gov.uk/duke-of-newcastle-2,,410
  http://www.number10.gov.uk/duke-of-portland,,410
  http://www.number10.gov.uk/duke-of-wellington,,410
  http://www.number10.gov.uk/e-petitions,http://epetitions.direct.gov.uk/,301
  http://www.number10.gov.uk/earl-grey,,410
  http://www.number10.gov.uk/earl-of-aberdeen,,410
  http://www.number10.gov.uk/earl-of-bute,,410
  