We have a right of way over a private road owned by one of our neighbours, although we all chipped in to build it. Now someone else has got planning permission to build another house off the road. Can we refuse him a right of way, since it will mean heavy lorries going to and fro?
For the complete picture you should show your title deeds to a solicitor. But it’s likely that the owner of the new house will have to pay the owner of the road for a right of way over his property. It’s unlikely the owner of the road would be able to refuse access (although the fee will be a matter for negotiation) but you probably won’t have a say in the matter, since you only have a right of way yourselves.