Paterson worked as the live-in caretaker, but was asked to vacate the High Park Farm on the Mull of Kintyre.
It is believed estate manager Bobby Cairns, 52, who lives in nearby Campbeltown, has also been let go after 35 years.
"They are very upset. They have been loyal servants to Paul and did the whole vegetarianism thing with no killing on the farm. They stuck to his principles so it seems quite harsh to dump them now," said a source.
However, a source close to the musician said that the farm was not being taken care of properly and McCartney had to change the management.
--IANS (Posted on 08-10-2013)