UK's Ithaca Energy falls after posting net loss in 2025
** Shares of the North Sea oil and gas producer Ithaca Energy ITH.L down 5% at 257p, biggest loser on FTSE 250 index .FTMC ** Co posts 2025 net loss of $84.1 million after booking a one-off charge linked to Britain's extended windfall tax ** Loss vs last year's profit of $153.1 million ** YTD, stock has gained ~55% ($1 = 0.7492 pounds) (Reporting by Neeshita Beura in Bengaluru) ((Neeshita.Beura@thomsonreuters.com))