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Thank you for your question. You have a legal right to live in your house without other causing a nuisance and also breaching the title deeds so as to cause you nuisance. You should see a solicitor about taking out an injunction preventing the neighbour from running a nursery for those reasons. You can also seek the costs. Your lawyer will write a pre action letter in the first instance requesting that they cease and desist and court action can follow if they ignore that letter.