PA PhotosJack Butland was understudy to Joe Hart and Rob Green at Euro 2012
Liverpool have been linked with a £7.5 million move for the 19-year-old, who became England's youngest-ever goalkeeper when he made his debut against Italy in Berne on Wednesday.
Butland, who went to Euro 2012 with England, was also Team GB's first-choice goalkeeper during the Olympics.
The goalkeeper has limited experience at domestic level he only made his Birmingham debut on Saturday, having played 24 times on loan at League Two Cheltenham last season.