Use a blank sheet as the starting point for downloading data.  The layout of the data is shown in the image below:

addon layout

Each data series consists of two columns and are loaded from left to right.  Multiple data series can be included on the same sheet.  Row 1 is reserved for the series ID.  No other data other than the series ID or sort code should be entered on the first row or you will encounter an error when downloading or updating the data. 

The series id can be entered anywhere on the first row.  You may enter the appropriate data in rows 2 through 4 directly under the series id if you want results that differ from the default and you know what data is valid.