Newcastle United are on the lookout for a new U21 manager. The Newcastle academy hasn’t always been the most productive when it comes to the first-team but had to be called upon last season. Indeed, an injury crisis limited Eddie Howe’s options for much of the campaign, meaning he had to turn to some of the club’s promising youngsters. READ MORE: Newcastle United Pre-Season Tour 2024: Destination, Dates, Fixtures, How to Watch & MoreLewis Miley was perhaps the headline example of that. Thrust into the starting eleven, the talented teenager impressed and was duly rewarded with a new contract. B…