Renault's takeover of Lotus has led to the team requiring a new design for the majority of its parts in 2016.
Lotus switched from a Renault power unit to Mercedes last season, with an improved chassis leading to a stronger year than 2014 as the team scored 78 point including one podium. However, with Renault returning as a constructor and purchasing Lotus over the winter, the team is reverting back to the French power unit.
Technical director Nick Chester says last year's car still forms the basis of the team's 2016 design but more changes need to be made to accommodate the new engine.
"It’s the third year under the current regulations so it’s natural for this year’s car to evolve from the E23 on a design front," Chester said. "Some parts will share the same design although with a change of power unit, the majority of the parts are a new design.
"I’m pleased to say we are working on [the new car] fully on all fronts and looking forward to seeing it hit the track."
And Chester says last year's E23 will go on to be a show car having last been run at the Pirelli tyre test in Abu Dhabi.
"It came back and was stripped down; parts were inspected and serviced. At the moment, both E23s are totally stripped down and sitting there as bare chassis. They only exist in kit form right now really.
"Each part is logged and tenderly cleaned then ‘filed away’. Now it is all about the 2016 car and there’s plenty of work to be done before testing begins."
Hamilton v Prost v Schumacher
Andrew LewinAndrew first became a fan of Formula 1 during the time when Michael Schumacher and Damon Hill were stepping into the limelight after the era of Alain Prost, Nigel Mansell and Aryton Senna. He's been addicted ever since, and has been writing about the sport now for nearly a quarter of a century for a number of online news sites. He's also written professionally about GP2 (now Formula 2), GP3, IndyCar, World Rally Championship, MotoGP and NASCAR. In his other professional life, Andrew is a freelance writer, social media consultant, web developer/programmer, and digital specialist in the fields of accessibility, usability, IA, online communities and public sector procurement. He worked for many years in magazine production at Bauer Media, and for over a decade he was part of the digital media team at the UK government's communications department. Born and raised in Essex, Andrew currently lives and works in south-west London.