I am a United States citizen and studied abroad in England from September 1, 2016 to December 16, 2016 with my temporary studentwithout a visa that was given to me at Customs. I am now planning to return to London on March 24, 2017 and leave on April 5 2017.
Do I need to get any specific visa or is the fact that it is just a vacation allow me to not need a visa?