anchor.diff:  http://www.hm-treasury.gov.uk/budget2012_statement.htm,,410
   http://www.hm-treasury.gov.uk/budget2012_supporting_growth.htm,,410
   http://www.hm-treasury.gov.uk/budget2012_videos.htm,,410
  -http://www.hm-treasury.gov.uk/budget2013.htm,https://www.gov.uk/government/news/budget-2013-an-overview,301
  -http://www.hm-treasury.gov.uk/budget2013_debtreserves.htm,https://www.gov.uk/government/topical-events/budget-2013,301
  +http://www.hm-treasury.gov.uk/budget2013.htm,https://www.gov.uk/government/topical-events/budget-2013,301
  +http://www.hm-treasury.gov.uk/budget2013_debtreserves.htm,https://www.gov.uk/government/publications/debt-and-reserves-management-report-2013-to-2014,301
   http://www.hm-treasury.gov.uk/budget2013_documents.htm,https://www.gov.uk/government/publications/budget-2013-documents,301
   http://www.hm-treasury.gov.uk/budget2013_help_to_buy.htm,https://www.gov.uk/affordable-home-ownership-schemes/help-to-buy-equity-loans,301
   http://www.hm-treasury.gov.uk/budget2013_infographics.htm,https://www.gov.uk/government/publications/budget-2013-infographics,418
  
positive.code: http://www.hm-treasury.gov.uk/green_book_guidance_asset_valuation.htm,https://www.gov.uk/government/publications/asset-valuation-valuation-of-public-sector-assets,418
  http://www.hm-treasury.gov.uk/green_book_guidance_competition.htm,https://www.gov.uk/government/publications/competition,418
  http://www.hm-treasury.gov.uk/green_book_guidance_crime.htm,https://www.gov.uk/government/publications/crime,418
  http://www.hm-treasury.gov.uk/green_book_guidance_discounting.htm,https://www.gov.uk/government/publications/the-green-book--2,301
  http://www.hm-treasury.gov.uk/green_book_guidance_environment.htm,https://www.gov.uk/government/publications/environment,418
  http://www.hm-treasury.gov.uk/green_book_guidance_health.htm,https://www.gov.uk/government/publications/health,418
  http://www.hm-treasury.gov.uk/green_book_guidance_mcda.htm,https://www.gov.uk/government/publications/multi-criteria-decision-analysis,418
  
negative.code: http://www.hm-treasury.gov.uk/tax_pay_appointees_review.htm,https://www.gov.uk/government/publications/review-of-the-tax-arrangements-of-public-sector-appointees,418
  http://www.hm-treasury.gov.uk/tax_pensions_increases.htm,https://www.gov.uk/government/publications/pensions-increase,418
  http://www.hm-treasury.gov.uk/tax_policy_making_new_approach.htm,https://www.gov.uk/government/publications/the-new-approach-to-tax-policy-making,418
  http://www.hm-treasury.gov.uk/tax_updates.htm,https://www.gov.uk/government/publications,301
  http://www.hm-treasury.gov.uk/terms_and_conditions.htm,,410
  http://www.hm-treasury.gov.uk/terms_copyright.htm,,410
  http://www.hm-treasury.gov.uk/terms_copyright_faqs.htm,,410
  