Heading to Round 5 of the 2015 Formula 1 world championship, there is a feeling in the paddock that Lotus have yet to unlock the full potential of their E23 in the hands of Romain Grosjean and Pastor Maldonado, but Barcelona could be the place where a raft of upgrades could push them up the pecking order. Speaking ahead of the Spanish Grand Prix weekend, technical director Nick Chester revealed, 'It will be an interesting weekend as many teams will bring decent upgrades to the first European race of the season and we are working on bringing a reasonably significant package in terms of bodywork upgrades ourselves.' 'There’s a certain amount of anticipation to see what everyone turns up...
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