The building dates from the late 18th century. The pub was originally a wooden hut on another site (possibly Gaymer's Lane). The name was changed from the New Inn to remember Thomas Cavendish, who was born in Trimley St Martin and was the first man to command a ship that deliberately circumnavigated the world (previous circumnavigators had done so accidentally). It was apparently renamed to celebrate his return to Trimley from his circumnavigation.
(Most pub, location & historic details collated by Nigel, Tony or Keith - original sources are credited)
(some old PO directory information courtesy of londonpublichouse.com)
(*** historic newspaper information from Bob Mitchell)