Harry bought his house in London on 1 April 1995 and lived in it until 1 April 1996. From that date until 1 April 2001 Harry was required by his employers to work overseas. On returning, Harry moved back until 1 October 2001 when he went to live with his mother. The house remained empty until 1 April 2014 when it was rented out. Harry sold his house on 30 September 2019 realising a gain of 100,000. Required Calculate the gain on sale of Harry's house