diff --git a/out/stacked.html b/out/stacked.html
index 2bbefee..ef33120 100644
--- a/out/stacked.html
+++ b/out/stacked.html
@@ -5,6 +5,15 @@
 </head>
 <body>
     <h1>Stacked river levels for the Great Stour around Canterbury, Kent</h1>
+
+    <ul>
+        <li><a href="#wye">Wye</a></li>
+        <li><a href="#chartham">Chartham</a></li>
+        <li><a href="#westgategardens">Westgate Gardens</a></li>
+        <li><a href="#vauxhallbridge">Vauxhall Bridge</a></li>
+    </ul>
+
+    <h2>Background</h2>
     <p>
         The charts below show the annual levels of the Great Stour at various locations between Ashford and Canterbury in Kent.
     </p>
@@ -16,16 +25,16 @@
         Data has been gathered from the Environment Agency in England and is available under the the <a href="https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/">Open Government Licence v3.0</a>, except where otherwise stated.
     </p>
 
-    <h2>Wye</h2>
+    <a id="wye"><h2>Wye</h2></a>
     <img src="canterbury-1145-stacked.png" />
 
-    <h2>Chartham</h2>
+    <a id="chartham"><h2>Chartham</h2></a>
     <img src="canterbury-1135-stacked.png" />
 
-    <h2>Westgate Gardens, Canterbury</h2>
+    <a id="westgategardens"><h2>Westgate Gardens, Canterbury</h2></a>
     <img src="canterbury-9274-stacked.png" />
 
-    <h2>Vauxhall Bridge, Canterbury</h2>
+    <a id="vauxhallbridge"><h2>Vauxhall Bridge, Canterbury</h2></a>
     <img src="canterbury-1143-stacked.png" />
 
 
