Newcastle United will surely need to rebuild their defence this summer. Indeed, the signing of a new central defender was understood to have been on Newcastle’s agenda last year but the transfer budget just couldn’t stretch that far. The situation has since become more pressing, too. While the club were believed to have looked at potential signings to bolster their backline even before the long-term injuries to Sven Botman and Jamaal Lascelles, the fact both will miss months of action makes the need more urgent. Tosin Adarabioyo and Lloyd Kelly of Fulham and Bournemouth respectively are unders…