NCN 1 Route gpx file

Hello....I'm planning a ride using the NCN 1 this summer. Inspired by a family wedding and realising we both live on the route, I'm planning to ride home to North Scotland from Norwich. I've just downloaded the gpx file available here but it appears to be only the route from north to south. Is there a gpx file of the NCN 1 from South to north? Otherwise I'll be the wedding guest that never leaves!! 🤭🚴🚴🚴