Grace was still in a lot of pain, come morning. We were on our way to Boots' pharmacy, however, and it suddenly felt a lot better. The pain was subsiding, but irritation remained, so she bought eye drops specifically for that, and we were able to move on.
We left Berkhamsted at around 10:30, joining NB Morialti ("He died high"!) for the seven locks to Cowroast, where we used the services and parted company with them while they took on water.
We carried on to Bulbourne and moored in exactly the same spot as we'd used on the way down. It was still warm and sunny.