(function (Modules) {
  "use strict";

  Modules.DeselectTaxonClick = function () {
    var helper = window.GOVUK.taxonomyTreeHelper;
    this.start = function (container) {
      var deselectTaxonClick = function () {
        var taxon_name = $(container).closest('.taxon-breadcrumb').find('li:last').text() ;
        $("input[data-taxon-name=\"" + taxon_name + "\"]").each(function(idx, el){
          $(el).prop('checked', false);
          if (!helper.hasCheckedSiblings(el)){
            helper.uncheckAncestors(el);
          }
        });
        $('.topic-tree').trigger('change');
        return false;
      };

      container.on("click", deselectTaxonClick);
    };
  };

})(window.GOVUKAdmin.Modules);

@@ -85,17 +85,29 @@
     var 
-h
+taxonomyTreeH
 elper = 
@@ -454,17 +454,29 @@
    if (!
-h
+taxonomyTreeH
 elper.ha
@@ -510,17 +510,29 @@
         
-h
+taxonomyTreeH
 elper.un

Rename helper to taxonomyTreeHelper