Matthew Carter says there is no danger of Lotus being forced to miss any of the remaining flyaway rounds on the 2015 Formula 1 World Championship calendar as discussions over its future drag on.

Despite the on-track boost from its first podium finish in two years at Spa-Francorchamps, Lotus has generally generated more headlines off the track over its increasingly desperate financial problems and its ongoing negotiations with Renault over a possible sale.

As it stands, Renault is still yet to decide whether to take Lotus over and revive its entry as a fully-fledged manufacturer, delays that have halted development on the car and raised continuous pressure on Lotus' hopes of clearing its mounting debts.

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Indeed, with its participation in the Italian Grand Prix put in doubt after the team trucks were impounded following a court order brought by former reserve driver Charles Pic, Carter says there is no danger that Lotus will be faced with similar difficulties going forward.

"I can guarantee you that we'll be at Singapore," he said. "One of our sea-freight containers has left, our airfreight will leave this week. We will be in Singapore. Our financial issues are all over the press, everyone is aware of them. We're working as hard as we can behind the scenes to get them sorted out. None of them have become terminal, obviously. We're still here, we're still racing and we will continue to do that.

Referring to the discussions with Renault, Carter admits he is working towards ensuring it goes through in order to secure the future of the Enstone-based squad, which operated Renault's former factory team until 2009.

"The negotiations that were referred to are going on behind the scenes. I'm hopeful that's going to secure our future one way or the other going forward - and when I say one way or the other it just means we have more than one option going forward to secure the future of the team.

"As far as the race of the races this season, we have a budget in place and we will operate to that budget and will be at all the races."