diff --git a/lib/helpers.rb b/lib/helpers.rb
index 1d29c0d..9b2c8e5 100644
--- a/lib/helpers.rb
+++ b/lib/helpers.rb
@@ -21,6 +21,10 @@ def authority_url(authority_name)
   "/authorities/#{slug(authority_name)}/"
 end
 
+def download_button(filename, label='Download CSV data')
+  "<a class=button href=#{filename} download=#{filename}>#{label}</a>"
+end
+
 def normalise_decision(d)
   # https://schemas.opendata.esd.org.uk/PlanningApplications/LocalOpenDataIncentiveSchemePlanningApplicationsSchemaGuidance.pdf
   
diff --git a/views/appeals.haml b/views/appeals.haml
index 310b5e0..58a9451 100644
--- a/views/appeals.haml
+++ b/views/appeals.haml
@@ -36,10 +36,7 @@
 
 %h2 Appealed applications
 
-%p
-  - csv_fn = 'inlink-appeals.csv'
-  %a.button{ :href => csv_fn, :download => csv_fn }
-    Download CSV data
+%p= download_button('inlink-appeals.csv')
 
 %table#applications
   %thead
diff --git a/views/authority.haml b/views/authority.haml
index 8ed18b8..6c08791 100644
--- a/views/authority.haml
+++ b/views/authority.haml
@@ -23,10 +23,7 @@
 
 %h2 Applications
 
-%p
-  - csv_fn = slug(auth['authority_name']) + '.csv'
-  %a.button{ :href => csv_fn, :download => csv_fn }
-    Download CSV data
+%p= download_button(slug(auth['authority_name']) + '.csv')
 
 %table#applications
   %thead
diff --git a/views/index.haml b/views/index.haml
index 30b9f95..e2652fe 100644
--- a/views/index.haml
+++ b/views/index.haml
@@ -2,10 +2,7 @@
 
 %p.warning There are typically two applications per kiosk: one for full planning permission or telecoms prior approval, and one for advertisement consent. So the number of kiosks applied for is half the number of applications.
 
-%p
-  - csv_fn = 'inlink-summary.csv'
-  %a.button{ :href => csv_fn, :download => csv_fn }
-    Download summary CSV data
+%p= download_button('inlink-summary.csv')
 
 %table#summary
   %thead