HONG KONG, Jan 25- Hong Kong shares look set to start firmer on Friday, tracking positive sentiment from encouraging U.S. data released on Thursday and after solid China factory data. Its investors Singapore sovereign fund GIC, U.S. private equity fund TPG Capital and Viva China Holdings Ltd had given their "irrevocable undertakings" to the company.
HONG KONG, Dec 3- Hong Kong shares could start December testing 2012 highs on Monday, helped by official data showing headline manufacturing activity in China rose to a 7- month high of 50.6 in November from 50.2 in October.