Lewis Hamilton to Mercedes - Jenson Button and Fernando Alonso on move

Jenson Button believes Lewis Hamilton is leaving McLaren for Mercedes because he wants a new challenge, but insists he is not thinking of moving himself.

Button drove under Ross Brawn - now team principal at Mercedes - in 2009, and says Hamilton will be working with a "great bunch of people".

Ferrari's Fernando Alonso, meanwhile, thinks Hamilton has left McLaren "for a better life", saying it is good to "move on" from his former team.

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