anchor.diff:    # Match URLs like:
     #   /countries/japan/fees1/
     #   /countries/czech-republic/fees1
  -  location ~ /countries/[a-zA-Z\-]+/fees {
  +  location ~* /countries/[a-zA-Z\-]+/fees {
       proxy_pass http://ukba;
       # Can't use $http_host as that might be eg aka.ukba.homeoffice.gov.uk
       proxy_set_header Host www.ukba.homeoffice.gov.uk;
  
positive.code:     proxy_set_header Host www.ukba.homeoffice.gov.uk;
    }
  
    location ~ (/static/biaAssets/*|/images/*) {
      proxy_pass http://ukba;
      # Can't use $http_host as that might be eg aka.ukba.homeoffice.gov.uk
      proxy_set_header Host www.ukba.homeoffice.gov.uk;
  
negative.code:   # Match URLs like:
    #   /countries/angola/fees
    #   /countries/czech-republic/fees
    location ~* /countries/[a-zA-Z\-]+/fees {
      proxy_pass http://ukba;
      # Can't use $http_host as that might be eg aka.ukba.homeoffice.gov.uk
      proxy_set_header Host www.ukba.homeoffice.gov.uk;
  