Maybe we really wanted to capture Vigouroux so let him bring his mate, a boyhood red, to help him settle in. Everyone's happy.
Or maybe he's a talented young player and I'm thinking too much about it. It is odd to sign a young player at 20 years old, as you expect them to be playing first team football at that point.
I don't think we've had a stand out young goalkeeper since Gulacsi, so hopefully Vigouroux steps up, maybe into the 3rd GK spot.