While the weather forecasts suggest that there will be rain at some stage during the Spanish Grand Prix in Catalunya – and similar conditions have helped to make the recent Australian, Malaysian and Chinese races nail-bitingly exciting, both McLaren’s Jenson Button and Lewis Hamilton say that they would really prefer dry weather for practice, qualifying and the race. And for purely practical reasons – so many of the teams have brought along heavily revised aerodynamic packages, that they are all eager to learn exactly where they stand relative to one another.