An unofficial asterisk is still hovering above this year's inaugural running of the Russian grand prix.
Earlier, F1 legend and Mercedes team chairman Niki Lauda dismissed suggestions the sport should boycott the Sochi event amid the escalating Crimean crisis.
But last month, it emerged that the burgeoning F1 career of Sauber test driver Sergey Sirotkin was suddenly in doubt, after his sponsor SMP Bank was subject to US and European sanctions.
Sirotkin's backer, Boris Rotenberg, is reportedly close to Russian president Vladimir Putin, with many other Russian athletes also being affected by his frozen bank accounts.
Now, a prominent British politician has cast doubt on the viability of...
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