I think how highly the club rate Walton is the driving force. They see him as a future No. 1, but want him to gain more experience by playing first team football, hence the proposed loan move. We still need 3 keepers, so this guy will provide strong competition for Stockdale.
If Walton does...
I doubt the fact we are signing him will hinder other transfers. If this is completed then it's 4 signings in 2 weeks, showing they can negotiate with more than one player / agent at a time!