James May has taken a tongue-in-cheek dig at his The Grand Tour co-star Richard Hammond’s “stupidity” following a costly mistake he made in the upcoming special. The Grand Tour: Sand Job will see May, Hammond and their former Top Gear colleague Jeremy Clarkson heading to Africa for their penultimate adventure. The trio will travel to the remote country of Mauritania, where they must complete their journey in modified, desirable sports cars – which they’ve bought on a budget. Clarkson opted for a Jaguar F Type V6, with Hammond picking an Aston Martin Volante and May going for a Maserati. It see…