I would like to purchase a narrow boat in the UK and reside on it. My understanding of visas and passports, etc. is: US. Citizens are not required to have a visa for enter to the country. The basic passport allows one to visit for 6 months and then one must leave. How long must one be gone before returning? Does one have to go back to one's country of origin, or just exit the U.K. for a specified period of time and then return? I wondered if it would be possible to take the boat to France or Ireland when the 6 months is up, live on the canals there for a specified time and then return to U.K.? This sounds like a wonderful way to retire and really experience Europe.