Renault has completed its takeover of the Lotus team and will return to Formula 1 as a constructor in 2016.

The French car giant has finalised the deal and its lawyers told an insolvency judge: "We have the keys, so to speak."

The move ends months of speculation and secures the future of the team based in Enstone in Oxfordshire.

They have won four F1 drivers' titles - two as Benetton with Michael Schumacher in 1994 and 1995, and two as Renault with Fernando Alonso in 2005 and 2006.

An insolvency petition that would have put the team into administration was formally dismissed.

Renault sold the team to investment group Genii Capital at the end of 2009 after deciding to quit as a constructor, although it remained involved as an engine builder.