By Dan Marsh Manchester United academy graduate Tyler Blackett is on the lookout for a new club after parting company with Rotherham United following their relegation from the Championship. The 30-year-old defender joined the Red Devils at the tender age of eight and went on to feature for England at youth level from the Under-16s through to the U21s. He would not, however, play regularly for United. Despite Blackett’s dearth of first-team opportunities, he was still held in high regard by Louis van Gaal, United’s manager at the time. And the Dutchman even predicted that the centre-half, who c…