Jenson Button has insisted McLaren Honda still needs to make considerable efforts to be able to compete at the front. He stressed however that the team have already made a significant improvement over the winter.
Having endured a very troubled 2015 in their first season together, McLaren and Honda have raised their game come this season by improving their reliability and also made gains in terms of speed.
The team's 2009 champion Jenson Button is fuelled by the improvements, but conceded that relentless work is needed.
"The energy deployment has improved which puts us much closer to the other manufacturers," stated Button to Sky Sports.
"However, we still have to do more to be really competitive, especially in terms of power and aerodynamics. The important thing is that the reliability of the power unit is better so we can develop faster."
Button admitted not only Honda has serious homework to do, but also McLaren has to make quick and significant improvements in terms of the car's aerodynamics.
"We have had some changes aerodinamically from winter to now, but we need more, so we will be pushing very hard to bring new parts to every race".