Two -time world champion Alonso rejoins Button , the stable he left in one day . Alonso will be partnered by Jenson Button , retained above Ron Dennis . McLaren chairman McLaren labels the duo 'the best driver lineup ' of any F1 team . rookie Kevin Magnussen will stay on as reserve and test driver .
Two-time world champion Alonso rejoins McLaren , the stable he left in 2007 . Alonso will be partnered by Jenson Button , retained above rookie Kevin Magnussen . McLaren chairman Ron Dennis labels the duo 'the best driver lineup ' of any F1 team . Magnussen will stay on as reserve and test driver .