Many thanks and in particular for the wording of the right of way. Though I wish I was about to be able to tell you otherwise, extinguishing the right of way unilaterally is likely to be exceptionally difficult I fear. Rights of way (easements) are very very difficult to terminate unilaterally, intentionally so. They can be terminated by Deed (i.e. with agreement from your neighbours where they enter into a deed of release) however from what you say they are unlikely to agree to such a termination.
Alternatively if you can show that you reached an agreement with your neighbours to release the right of way which you have relied upon and subsequently they have renegged on their part of the bargain, there is a basis for a claim for the right to be extinguished under something called equitable estoppel however I do not think these circumstances apply from what you say.
Finally you can seek to terminate the right of way under the doctrine of abandonment. For this to be successful you have to show that the right of way is not exercised in practice but moreoever that your neighbours intended to abandon their right of way. Failure to exercise their right of way is not sufficient on its own. There was a case where a person successfully showed that a right of way had not been exercised for circa 100 years but still failed because the court held that failure to exercise on its own is not evidence of intention not to exercise. Courts have accepted that where a landowner has altered his land in some permanent way so as to make exercising a right of way impossble as intention but even this is not straightforward.
It is of course possible where you cannot show any of the above apply, to enter into a negotiation with the neighbours. It could be that they may be willing to release their right in exchange for something else, such as an alternative right you may be able to grant or for a sum of money. If the right of way is not exercised in practice you may be able to stop up the right of way physically though you would need to be prepared that the neighbours may object if they notice you have done so. I am sorry the above is unlikely to make for happy reading and wish I could give you better news but Ihope at least it gives some clarity to your options. Obviously do come back to me if you would like to discuss any of the options in more detail.
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