Ralph, I came across a few more typos in the Battle Book.
Page 4, DESIGN NOTE
"As their is very little for the Scots to do..." should be "As there is very little for the Scots to do..."
Page 11, ENGLISH COMMANDS
"Edward II is not replaced is he is killed." should be "Edward II is not replaced if he is killed."
Page 18, Historical Background:
Pyrennes should be Pyrenees.
Trastàmore should be Trastámara, (the accent on the second "a" should be acute rather than grave, like in Nájera).
Page 18, INITIAL DEPLOYMENTS
Trastàmora should be Trastámara, with the accent change mentioned above.
Page 20, Reinforcements for the Army of Prince Edward
There is no "[a]" indicating to what the "a" note at the bottom of the first column is referring.