No, you do not need a passport to travel to the Isle of Man from within the United Kingdom (including England, Scotland, and Wales) as it is part of the British Isles. A valid form of identification such as a driver's license or a government-issued ID card is usually sufficient for ferry travel to the Isle of Man. However, it's always a good idea to check with the ferry operator or relevant authorities for the most up-to-date travel requirements and documentation needed for your specific journey.