Possible Clues:

• Middle part of a pair of spectacles
• Is familiar with, we hear, part found on bridge
• Spooner's model, family girl getting a piece of facial protection
• Reportedly understands truce is something that can protect bridge
• Relative entertains foreign brass, retrieving some of glasses
• Is aware of end of war being reported — so removes this from face?
• Son comes back with sweetheart to share the rest across span of bridge
• Bridge-crosser providing protection
• Eyeglasses feature
• Bit of armour: is familiar with rest, it's said