There is a discussion of this "command pilot" position in this book "Reluctant Witness: Memoirs from the Last Year of the European Air War 1944-45"
By James J. Mahoney and Brian H. Mahoney:
https://books.google.com/books?id=cd...0pilot&f=false
Click on the second page showing on the link, which starts out "During the brief interval....."
He discusses several aspects and duties of the "command pilot".