Possible Clues:

• In the dark about knight wearing regimentals
• In the dark, when knight's wearing regimentals
• Having military dress on, name to be sewn in in the dark
• Lacking intelligence, like soldiers outside entrance to NAAFI
• Lacking intelligence Pole enters in regimentals
• Not told about number in military clothes
• Missing dope finally hidden, as constables are about
• Not made to stay at home in the dark
• There's no knowing when Ned will be in uniform
• Ignorant, like a policeman that's new coming in