Newcastle United could be busy this summer. Indeed, there has been talk of a big rebuild at St James’ Park following a testing season at times. Quite whether or not the FFP limitations that loom over Newcastle will allow Eddie Howe to completely revamp his squad remains to be seen of course but it seems the defence will be looked at. The signing of a central defender was understood to have been on the agenda last summer too but the transfer budget ultimately just did not stretch that far. As a result, the club were believed to have looked at options there even before the long-term injuries to …