Middleton is a village and civil parish in the City of Lancaster in Lancashire, England, between Heysham and Overton. It had a population of 705 in 2011. Middleton was the location of Middleton Tower Holiday Camp, which opened in 1939. The camp was owned by Pontin's from July 1955 until its closure in October 1994. By 2008, the holiday camp ha…Middleton is a village and civil parish in the City of Lancaster in Lancashire, England, between Heysham and Overton. It had a population of 705 in 2011. Middleton was the location of Middleton Tower Holiday Camp, which opened in 1939. The camp was owned by Pontin's from July 1955 until its closure in October 1994. By 2008, the holiday camp had been redeveloped as a gated community with bungalows and flats.