diff --git a/UK-IPS-time-series-extract.do b/UK-IPS-time-series-extract.do
index 6bed5db3ef2b648617bdc877ae659a2054f609db..1047c11388a35dc53635105d163deceee1ab97b0 100644
--- a/UK-IPS-time-series-extract.do
+++ b/UK-IPS-time-series-extract.do
@@ -1,6 +1,6 @@
 /*********************************************************************
-* Extracting variables from IPS 1993 onwards to produce a 'harmonised' microdata time series
-* mainly for use in DEMAND
+* Extracting variables from IPS 2001 onwards to produce a 'harmonised' microdata time series
+* It may work for earlier years but that has not been tested.
 * 
 * International Passenger Survey: 
 * http://discover.ukdataservice.ac.uk/series/?sn=2000025