Bottas closer to Mercedes move amid Williams shake-up

By Alan Baldwin LONDON (Reuters) - Formula One's post-season shake-up took another spin on Tuesday with Williams announcing the departure of technical head Pat Symonds while Valtteri Bottas moved closer to Mercedes and Felipe Massa's retirement looked to be coming to an end. Williams said Symonds, 63, would be leaving them on Dec. 31, the news coming amid speculation that Paddy Lowe is set to join them from dominant world champions Mercedes to take up a similar role. Symonds, who worked with the