Derby County are stepping up their pre-season training as Paul Warne takes his squad to Spain for a week of intense work. The Rams are preparing for their return to the Championship this season, with plans of building a stable platform in the division. It requires plenty of work across the whole club, with a summer transfer window that is expected to be busy with incomings and outgoings at Moor Farm. Derby have already welcomed four new signings, with Ben Osborn, Kayden Jackson, Jerry Yates and Kenzo Goudmijn through the door. That could soon become five as reports claim that Derby have agreed…