Brough, 30, was a surprise omission from McNamara’s 30-man Elite Training Squad announced earlier this season, despite being a key figure in the Giants’ excellent start to 2013.
The former York, Hull, Castleford and Wakefield man captained Scotland in the 2008 competition, but was persuaded to switch allegiance to England in 2011, when he was named in the ETS, and played against the Exiles in July last year.
He said: “I’ll be honest, I haven’t even thought about it. It went to the back of my mind when I didn’t get selected, I just thought I’ll knuckle down, keep doing what I’m doing, playing in a good team and it’s paying off, so I’m just trying to concentrate on my Giants form.
“They (England) won’t come calling, I’m happy where I am at the moment and I’ll make a decision later on.”
Whether McCormack will still consider Brough, should he decide to make himself available, after his defection to England remains to be seen.
Brough added: “The World Cup will come at the end of the year and it’s pretty much mid-season so not much has been said yet.”