He thought he might make England his permanent home.
Ben Franklin represented the Pennsylvania colonists before Parliament in London in 1757, and remained several years in England. He was back in 1764 and would protest the Stamp Tax on the colonies. He found that many in the English government thought the policies then being carried out would lead to disaster. Those concerned included the King's brother and the powerful Lord Chatham! Franklin had not fully realized the ground swell against the crown policy.
He would remain in England until 1775. When he found his efforts to change these policies were failing, he returned to America and was elected to the Continental Congress.