"We have a couple of ideas (about replacing Ben Foster) because we have known the situation for a long time and we have been working hard," Boothroyd has said.
"But whether we can bring in our targets is another matter.
"I send Sir Alex regular letters about how Ben is doing, about his lifestyle, and about what he is doing well and what he can improve on.
"The situation is a bonus for Manchester United, because we are sending an international goalkeeper back to them.
"It is good for us, because when big clubs want to loan out young players of immense talent, they might think about sending them to Watford."