diff --git a/ONS-UK-EFS-time-series-extract.do b/ONS-UK-EFS-time-series-extract.do
index 16ece5c03db4ea87093f856629002c169917e18a..5229bb0118724fdb4a363f2f6e3bafd255be83af 100755
--- a/ONS-UK-EFS-time-series-extract.do
+++ b/ONS-UK-EFS-time-series-extract.do
@@ -24,6 +24,9 @@
 * 2/5/2015 - this does not really work that well as (for example) variable names went to capital letters in 2010 (why why why)
 *	so a mechanism has been included to allow the extraction of bespoke variables sets once this script has set all variable names to lower case
 *
+* For all subsequent changes see:
+* -> https://github.com/dataknut/LCFS/blob/master/ONS-UK-EFS-time-series-extract.do
+
 * Copyright (c) 2002-2012 University of Essex, (c) 2012-2015  University of Southampton
 *
 * Author: Ben Anderson (b.anderson@soton.ac.uk, @dataknut, https://github.com/dataknut)