By Henry Saker-Clark, PA Deputy Business Editor & Lawrence Matheson BP has unveiled lower-than-expected profits amid a dip in oil prices and slimmer refining margins compared to last year. The energy titan reported an underlying replacement cost profit, its preferred metric, of $2.7billion (£2.2billion) for the first quarter, a drop from $4.9billion (£3.9billion) the previous year. Additionally, the London-based firm announced ambitions to achieve an additional $2billion (£1.6billion) in cost savings by 2026. Despite the profit downturn, BP plans to continue rewarding its shareholders, declari…