The land registry has to write out to the registered owner of the land (as per their system, i.e., the farmer) and ask if they have any objections to the modification to their folio (explaining the error that has occurred). They have to peruse the remapping of the original site to confirm all is in order. The farmer will probable obtain legal advice from his solicitor regarding same. The land registry is the State and if the State could have any possible liability regarding the issue at hand, they also will take legal advice on same. In all, what I am saying, is that these things take time; in your favour you say that it was a simple digitising error and should be readily amendable; if this is the case and all parties are in agreement, then the process should proceed relatively fast (another 5 weeks). My advice, keep in contact with the land registry personally and through your solicitor. Get somebody assigned to the case as soon as possible, then the process will move along.