Bank St Petersburg (BSP) and Oslo Marine Group (OMG) owner Vitaly Arkhangelsky both claimed the other to have been fraudulent during oral summing-up at the London High Court trial.

BSP is claiming $90m for alleged defaults on loan guarantees by OMG, but Russian businessman Arkhangelsky is counterclaiming for damages of $500m over allegations, denied by the bank, that it illegally appropriated OMG assets in 2009.

“This