Beauty Tech Group gains in London market debut
** Shares in Beauty Tech Group TBTG.L up 5.24% at 285.2p, among top 10 gainers across LSE ** British beauty devices-maker debuted on the London bourse at 271p giving it a market capitalization of 300 mln pounds ($403 mln) ** IPO comprises 10.7 mln new shares to raise 29 mln pounds, and 28.6 million shares to be sold by shareholders of co (Reporting by Prerna Bedi in Bengaluru) ((Prerna.Bedi@thomsonreuters.com; +91 98052 24616))