If you are considering walking this route yourself, please see my disclaimer. You may also like to see these notes about the maps and GPX files.
On reaching a road through Asheridge (not to be confused with Ashridge, where I do many of my local walks), next to the Blue Ball pub, I turned left for two or three hundred yards and then took a footpath on the right. This followed a hedge on my right, and was soon starting to drop downhill. After the hedge turned right (there were good views from this spot) the path dropped very steeply downhill and then started more gently uphill. Beyond this large arable field the path followed a hedgerow on the left through a meadow, then continued for about a quarter of a mile between hedgerows either side. It then turned left, still between hedgerows (somewhere along here I managed to scratch one of my fingers quite badly and had to stop and bandage it), dropped downhill slightly, and then rose uphill to reach the road through Chartridge next to a chapel (on my left).
The road through Asheridge, by the Blue Ball pub
The path from Asheridge to Chartridge
The path from Asheridge to Chartridge
View to the right from the path from Asheridge to Chartridge
View to the left from the path from Asheridge to Chartridge
The path from Asheridge to Chartridge
The path from Asheridge to Chartridge
The path from Asheridge to Chartridge
The path from Asheridge to Chartridge
The path from Asheridge entering Chartridge
I turned left along the road and then turned right onto a footpath (opposite The Bell pub). This soon entered a field where one path went right while I followed a second path going half-right. On reaching the right side of the field, the path turned left and ran parallel to the hedgerow. On eventually reaching the field corner, the path went through a metal kissing-gate on the right and immediately turned left and left again (so that I was walking behind another hedgerow of the field I'd just been in). There was another hedge just a few yards to my right.
The road through Chartridge
The path from Chartridge
The path from Chartridge