The UK supermajor posted a total profit of $16.9 billion for the first three months of 2013, up almost three-fold from the $5.8 billion reported for the same period last year, after receiving $12.5 billion from Russia’s Rosneft for its stake in TNK-BP.

However, underlying replacement cost profit (adjusted for non-operating items and fair value accounting effects) was $4.2 billion, down 10% from $4.7