Witan Investment Trust has delivered a positive third=quarter update, increasing its net asset value (NAV) and beating its benchmark over the three-month period.Between June 30th and September 30th, its NAV per share total return (calculated by including the debt at fair value) was 6.2% against its benchmark's return of 4.5%.During this period it also brought back a total of 470,500 shares, and paid an interim dividend of 6p (2011: 5.45p).At September 30th the fund has gross total assets of £1.18bn and gearing of 8%.CM