Ideally, the cadastre wants all applications to determine the exact line of a boundary made jointly by adjacent landowners. So, if you will perceive the need to know exactly (or within 10 mm, like practice guide 40) where your limit is, then it is wise: – talk to your neighbor and accept the need for such precision; – Agree with your neighbor that the goal is not to redefine or move the border itself, but to refine the accuracy with which your common border is described (although it may later prove necessary to move all the physical features that seem to mark the boundary but are out of position); – you agree with your neighbour to jointly appoint a boundary surveyor to advise and draw up the required plan in accordance with the specifications set out in Practice Guide 40; – make your request jointly to the cadastre. He warns: “It should be noted that the process of agreeing the border with a neighbour, whether for the purpose of concluding a border agreement or for the purposes of a given border, can even lead to violent disagreements, perhaps where there were none before. This could lead to a dispute over the border. This argument also applied to Section 2. Therefore, for a border agreement to be an agreement to which Section 2 applies, the objective of the parties to the conclusion of the agreement must be that it leads to a sale or other transfer of a land interest. § 2 would not be applicable solely because the contract had the effect of transferring a land interest if the parties did not intend to make such a transfer. In most border disputes, it will be necessary to use the services of an expert; either to establish the limit or to draw up detailed plans for litigation or comparisons. We can help you choose a measurement expert with expertise in border disputes. www.gov.uk/government/publications/boundary-agreements-and-determined-boundaries/practice-guide-40-land-registry-plans-supplement-4-boundary-agreements-and-determined-boundaries If, as a result of the determination of the precise boundary line, the physical characteristics on the basis of which the neighbouring landowners have so far recognized the boundary are in a different position from that fixed, it may be necessary to move the physical boundary to connect it to the fixed boundary. . . .