KKR raised its offer for UK-based Spectris to $5.6 bn, including 41.75 pound/share and a 28p dividend, edging past Advent's approved bid. The Spectris board now supports KKR's proposal. The bidding war highlights growing U.S. interest in undervalued UK firms. KKR shares have dipped 2.8% YTD despite raising $28 bn in Q2.