Looking at this question and your earlier one together it is most unlikely that any claim now for Adverse Possession will succeed. One essential requirement (and there are several) is that the land is fenced off to the absolute exclusion of the owner. The easement defeats this. Although it has not been used for many years it does not mean that it has been abandoned. You could block it off each end, but that is not enough as a simple court order would open it again. Your only hope is to go to court for an Order that it the easement is obsolete, the Land Registry will only remove it with a court Order. The ten years before submitting an Adverse Possession claim will start from then.