The 24-year-old left the Ireland camp on Monday to complete a move from Reading to West Bromwich ahead of tomorrow night's friendly against Croatia in Dublin.
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The fee was a transfer record for the Midlands club, surpassing the ?4.7m they paid for Spanish midfielder Borja Valero three years ago.
Trapattoni said: 'Shane has good qualities but he needs to improve in some areas of his game.'
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Source: Daily Mail
Source: Daily Mail