I have downloaded the latest and previous version (2017 & 2015) of Rolling Origin & Destination Survey (RODS) form TfL opendata web page (https://api-portal.tfl.gov.uk/docs) for my transport research. I’ve noticed that this survey began from 2003 according to the information from London data store (https://data.london.gov.uk/dataset/tfl-rolling-origin-and-destination-survey). I wonder if it is possible to access the older version of data prior to 2015? Or is anybody here could share these data with me? I really appreciate your help.