"Mason is a very promising," said Boothroyd.
"Working with him first hand, the thing that strikes you must is his character.
"He wants to train, work hard and wants to put everything he learns into action. When you look at him physically, you feel he might not be quite ready but it's his ability and skill that puts him into the reckoning. I've enjoyed working with him this past week and I'm looking forward to watching him."