Well, Valencia was a lot like Bahrain in that respect. The tarmac was very hot, about 41° C. therefore Red Bull and Lotus looked to be the best while Mclaren and Mercedes struggled horribly with tyre wear; despite Schumi’s podium.
The temperature at the British GP is generally cool. In fact, Silverstone is usually equally cold or colder than Shanghai. In that case, I consider Mercedes to be favourites. They have been quite unlucky with the weather for the past few races; but next up in Silverstone and Hockenheim will tip their way I reckon. Rosberg to repeat win, or Hamilton?
If the track temperature is any lower than 30°, Mercedes are going to be quicker than Red Bull and Lotus.