Lotus deputy team principal says there is 'nothing to report' from his side of the F1 paddock as speculation persists that Renault is closing on a deal to buy the team.

As F1 returns to action following the summer break with the Belgian Grand Prix, much focus remains on Renault and its potential plans to ramp up its involvement as a fully-fledged manufacturer through the purchase of Lotus.

Though it is believed many behind-the-scenes are pushing for Renault to make a full return to action - including Bernie Ecclestone - and a final decision is due in the next few weeks, taking on Lotus' existing debt is feared to be a stumbling block.

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For Lotus, which is currently sixth in the constructors' standings with nine races to go, the focus remains on the race track, with Gastaldi insisting there is nothing to say from his perspective.

"This is always part of Formula 1, the rumour, intrigue and speculation," he said. "We can expect all kinds of waffle in the Spa paddock but there's nothing to report from the team; we're focusing on our racing and we're hopeful of a strong result in Spa."

Renault last competed as a full manufacturer entry in 2009, when it sold a majority stake to Genii Capital. Though the outfit retained the Renault badge in 2010 and 2011, Renault's factory involvement since then has focused on its engine supply to Renault, with whom it won four world titles between 2010 and 2013.