He was Chairman of Rolls Razor Ltd, which made washing machines.
In July 1964 the company went bankrupt, and a subsequent investigation revealed irregularities in the company's accounts.
In 1969, Harris was charged with carrying on company business with intent to defraud the company's creditors, falsifying the balance sheet, and deceiving investors as to the company's financial state.With his trial ongoing as the 1970 general election was called, and despite the judge dismissing two charges, the Heston and Isleworth Conservative Association voted to reject Reader Harris and selected instead Barney Hayhoe.
On 29 May, Reader Harris was acquitted on the remaining charge; although time remained for his readoption, the Association stuck to its previous choice.
Reader Harris was married to Pamela Stephens from 1940 until their divorce in 1963; their three daughters survive him.
He is also survived by his second wife Una.
His son from his second marriage died in 2007.
Harris died on 7 July 2009, aged 96 years.