Eric Boullier admits Pirelli's tyre changes from Canadian GP 'frustrating' for Lotus

Lotus boss Eric Boullier has compared Pirelli's decision to revise their tyres mid-season to 'changing the dimensions of a football pitch at half-time' - but has nonetheless expressed optimism that his team will be able to adapt to the alterations.

Lotus will have to respond to the impending tyre construction changes without their highly-regarded former Technical Director James Allison, who left the team prior to the Barcelona weekend. Boullier, however, reiterated his faith in the promoted Nick Chester and the remaining wider technical team at Enstone to keep pushing on strongly with the E21. "We have a very strong technical department made of many people. It's an illustration of the strength of talent at Enstone that we were able to promote from within, and Nick Chester has been working on adopting his new role for some time now. "We have plenty of upgrades to come for the E21, as well as the additional challenge of reacting to the forthcoming tyre changes. We're confident we can maintain performance and development with this year's car whilst at the same time developing an exciting car for 2014 and the new regulations." The Frenchman also revealed that team had taken steps to ensure that the suspension failure that curtailed Romain Grosjean's Spanish GP wouldn't reoccur. "Our technical team has taken immediate action, identified where the problem was and redesigned a new part for Monaco onwards," Boullier added.