Break out the vodka: the 2014-15 Formula E season could be extended to include a race in Moscow.

There have been whispers that an additional round may be held in the Russian capital – possibly after the London event. If so, the new date would return the race calendar to the 10-event schedule that the series organiser had originally intended.

The sport had been due to visit Brazil in February, making a trio of South American locations, but the race was dropped. The gap left by the Rio de Janeiro omission has not been filled, although two races are being planned for the weekend of the London fixture to make up 10 in total.

Replacing Rio at relatively short notice was always going to be tough. In Formula E, everything is transported from venue to venue by train or sea wherever possible, to minimise the carbon footprint. As this approach is slower than air travel, it restricted the locations that the sport could visit between the two events in South American and the two subsequent races in North America. Mexico, Canada and New York were reputed to have been explored as options.

Should a Russian race really be under consideration, it would be challenging to pull off for a number of reasons, among them the logistics, the schedules of teams and drivers, and the time needed to design and obtain the necessary approvals for a city circuit. There are FIA criteria to meet too. Responding to our query on the subject, a spokesperson for the series said simply: “We don’t comment on rumours.”

There are already Russian connections to the series. The Formulec prototype electric racing car, which was bought by Formula E as an early demonstration vehicle, put on a demo run in Moscow back in 2011. The footage can be viewed on YouTube. And a report in a French newspaper yesterday listed Moscow as one of the first season venues.

We also understand that a 12-venue calendar for season two has been drawn up and is under consideration. Potential host cities include Dubai, Marrakech and Paris, which could be the season opener. Hong Kong remains a contender too, after it was removed from this year’s calendar after apparently failing to satisfy FIA track requirements.

To support the introduction of new constructors in season two, the schedule could make provision for an expanded testing programme. There could be up to six test days for the teams and as many as 15 for manufacturers.

The sport’s organiser initially conceived of a six month calendar that would run in the “off season” to avoid schedule clashes with more established motorsports series. Should Moscow be included in the 2014-15 calendar, it would mean the inaugural season stretches over 10 months. Adding races and testing commitments in season two, even without the long gaps that have occurred in the maiden season, would effectively turn Formula E into a full time, year-round job for teams and drivers. This could dramatically affect the driver line up for season two.

Details on next year’s calendar are expected to be announced within the next six weeks.