Sanitise without needing html safe

app/helpers/application_helper.rb

@@ -31,6 +31,12 @@ module ApplicationHelper
     !current_page?(notifications_path) && (authenticated_user_has_notifications? || unauthenticated_user_has_notifications?)
   end
 
+  def sanitise_characters(string)
+    return string unless string
+
+    string.gsub("'", "’").gsub("&", "and")
+  end
+
 private
 
   def paginated_title(title, pagy)

app/helpers/title_helper.rb

@@ -4,6 +4,7 @@ module TitleHelper
   end
 
   def format_title(searched, page_title, current_user, item_label, count, organisation_name)
+    organisation_name = sanitise_characters(organisation_name)
     if searched.present?
       actual_title = support_sab_nav?(current_user, organisation_name) ? organisation_name : page_title
       "#{actual_title} (#{count} #{item_label} matching ‘#{searched}’)"