** Shares of Gooch & Housego Plc GHH.L rise as much as 10% to 407p; stock among top pct gainers across London
** The maker of optical components and laser systems for industrial, scientific and medical applications says direct impact of U.S. tariffs expected to be "limited", and sees trading to be in line with its full-year expectations
** GHH says given its considerable U.S.-based manufacturing presence, the new tariffs could over time be a benefit to some parts of its business against their non-U.S. competitors
** Cavendish analysts say G&H's H1 trading update was "assuring" and organic revenue growth of 7.5% on constant exchange rates was "creditable"
** Currently stock at session high, trimming YTD losses to ~21%
(Reporting by Aby Jose Koilparambil in Bengaluru)
((abyjose.koilparambil@thomsonreuters.com))