All the best to him. A very good young keeper that has done well out on loan and hopefully he can get a promotion with West Brom and get a chance in the Prem to enhance his chances of playing for England.
Sounds like Foster is off to Watford so he should be able to nail down the number 1 spot, hopefully if he impresses at that level he'll be back in the prem soon either with WBA or another team will take a chance on him.