By Sruthi Shankar and Shubham Batra (Reuters) -The UK’s blue-chip index ended little changed on Monday as gains in precious metal miners were offset by losses in life insurers and investors turned cautious ahead of major central bank decisions and earnings later this week. The FTSE 100 ended flat but touched its highest level since Jan. 11 earlier in the session, as shares of oil majors BP and Shell rose nearly 1.0%. Precious metal miners topped the sectoral chart, rising 2.0%, and hovered around their two-week highs after gold prices firmed as rising tensions in the Middle East lifted demand …