Walker would also like to repay his manager for the faith and help Redknapp has given him - and could still do so if he gets the England job.
"He's been a massive influence," said Walker. "I saw myself as fifth choice when I came here but he gave me my chance and sent me on loan to get confidence. I went back to Sheffield United and started to believe in myself. Then players started leaving here and I thought, 'Why not?'
"But all my loan spells got me to where I am now. I also went to Northampton, QPR and Villa, who gave me a chance to play in the Premier League."