diff --git a/cave_data/2012-ns-08.html b/cave_data/1623-2012-ns-08.html
similarity index 85%
rename from cave_data/2012-ns-08.html
rename to cave_data/1623-2012-ns-08.html
index 27f0b57b2..07add4c0e 100644
--- a/cave_data/2012-ns-08.html
+++ b/cave_data/1623-2012-ns-08.html
@@ -10,7 +10,7 @@
 <body>
 <cave>
 <non_public>False</non_public><!-- 'False' or 'True'. True if the cave should only be visible to logged-in users. Caves are normally public, so enter 'False' unless you know otherwise. -->
-<caveslug>2012-ns-08</caveslug><!--(Required). Internal I.D. used to refer to this cave in entrance data files. Typically the same as the filebase, e.g. '1623-195'  -->
+<caveslug>-1623-2012-ns-08</caveslug><!--(Required). Internal I.D. used to refer to this cave in entrance data files. Typically the same as the filebase, e.g. '1623-195'  -->
 <official_name></official_name><!-- Name of the cave (normally in German)  Use &uuml; for u+Umlaut and &ouml; for o+umlaut eg H&ouml;hle for Hohle and Gl&uuml;ck for Gluck-->
 <area>1623</area><!-- the CUCC-defined areas shown in http://expo.survex.com/areas.htm -->
 <kataster_code></kataster_code><!-- 'length-or-depth/type exploration'
@@ -32,12 +32,7 @@ code used in the Austrian kataster e.g '1/S +' - https://expo/.survex.com/katast
 <unofficial_number>2012-ns-08</unofficial_number><!-- (Either this or kataster_number is required). Initial temporary cave ID used until kataster number is allocated e.g. '2012-DD-01'-->
 
 <entrance>
-  <entranceslug>2012-ns-08</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
-  <letter></letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
-</entrance>
-
-<entrance>
-  <entranceslug>2012-ns-08</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
+  <entranceslug>1623-2012-ns-08</entranceslug><!-- Internal ID to refer to each entrance instance in the entrance files (typically the same as that filename (e.g. 1623-161c). Matches the 'slug' field in the entrance file -->
   <letter></letter><!--Leave blank for single-entrance cave. If there is more than one entrace then the letter needs to be given. Generally matches the entranceslug ID.  -->
 </entrance>
 
diff --git a/cave_data/README.txt b/cave_data/README.txt
new file mode 100644
index 000000000..83bc42a30
--- /dev/null
+++ b/cave_data/README.txt
@@ -0,0 +1,4 @@
+yeah I know,
+the initial pending caves thing didn't name the files properly. It omoitted the "1623-" prefix.
+This needs fixing on the filenames, the slugs inside the files, the reference to the entrance, the entrance filename and teh slug inside the entrance file.
+For the remaining 2012-ns-NN files
\ No newline at end of file
diff --git a/entrance_data/2012-ns-08.html b/entrance_data/1623-2012-ns-08.html
similarity index 98%
rename from entrance_data/2012-ns-08.html
rename to entrance_data/1623-2012-ns-08.html
index 393f86fee..dbcd877e4 100644
--- a/entrance_data/2012-ns-08.html
+++ b/entrance_data/1623-2012-ns-08.html
@@ -14,7 +14,7 @@
 <body>
 <entrance>
 <non_public>False</non_public>
-<slug>2012-ns-08</slug>
+<slug>1623-2012-ns-08</slug>
 <name></name>
 <entrance_description></entrance_description>
 <explorers></explorers>
