Liz Truss has landed a big name from wonk world as her new media SpAd. Guido understands Policy Exchange brainbox Ruth Porter will be shopping for a new pair of wellies as she heads off to Defra. It’s a strong move all round, Ruth’s media handling experience will help boost the public profile of ambitious Liz, while another PX graduate moving into the heart of government bolsters their reputation as a feeder club for top Tory talent. Politically-ambitious Porter herself must be in line for a decent seat next time round. She will be replaced at PX by former Bank of England economist Steve Hughes. White Dee cruelly overlooked for the job…