By a stroke of luck , I managed to speak to an advisor, outcome being that my letter was fine , not friendly but not officious , sticking to the facts . Our wonderful Vets were happy for me to photocopy the letter and its gone . I`m not holding my breath but I have it on good authority that the owner has recently lost a case against them in the small claims court regarding a sale of one of their horses who turned out to have multi health problems , so maybe they wont want to revisit , fingers crossed xx