A laden aframax has been awaiting news of its fate for more than a month, while two oil traders contest the 100,000 tonnes of contaminated Russian crude it has onboard.

Azerbaijan’s Socar Trading has filed a claim in London against Glencore Energy UK seeking restitution of $52.9m plus damages, costs, interest and further relief, court papers reveal.

Socar Trading alleges the division of the Switzerland-based trader is in breach of contract because the crude onboard was tainted and therefore did not meet specifications.