Martha's son and Sarah's brother: Alfred Woodruff

This gentleman is identified as Alfred Woodruff, my great-grandmother Sarah's brother. The photo was dated 1916. Could he have been a policeman? We don't know. UPDATE: After contact with a number of London-based police-affiliated sources, we have discovered that Alfred may have been a Special Constable for the London Metropolitan Police. The armband on his left arm signifies that he is "on duty" and the right armband signifies his rank or divisional area. We are still looking for more info.

This photo is identified as Lulu Woodruff, we assume that she is Alfred's daughter (photo dated 1918), signed by her mother Lucy(?).