Depends if shoulder titles or cap badge were present, or some regimental link on personal items.
Brigadier-General L. J. Wyatt, the man who chose the unknown soldier, wrote the following in 1939, replying to the many inaccurate accounts which had been published,
‘I was GOC of British troops in France and Flanders and Director of the War Graves Commission, and the idea of an unknown warrior was put to me by the then Adjutant- General, Sir George Macdonagh, in response to Bishop Ryle’s suggestion, which I thought was a wonderful gesture.
‘In October, 1 received a notification from the War Office that King George V had approved the suggestion, and the proposal that the burial should be in Westminster Abbey on November 11. I issued instructions that the body of a British soldier, which it would be impossible to identify, should be brought in from each of the four battle areas — the Aisne, the Somme, Arras and Ypres, on the night of November 7, and placed in the chapel of St. Pol. The party bringing in each body was to return at once to its area, so that there should be no chance of their knowing on which the choice fell.
‘Reporting to my headquarters office at St. Pol at midnight on November 7, Colonel Gell, one of my staff, announced that the bodies were in the chapel and the men who had brought them had gone. With Colonel Gell, passing the guard which had been specially mounted, I thereupon entered the chapel.
‘The four bodies lay on stretchers, each covered by a Union Jack; in front of the altar was the shell of the coffin which had been sent from England to receive the remains. I selected one, and with the assistance of Colonel Gell, placed it in the shell; we screwed down the lid. The other bodies were removed and reburied in the military cemetery outside my headquarters at St. Pol.
‘I had no idea even of the area from which the body I selected had come; no one else can know it.
‘The following morning, the 8th, the Church of England, the Roman Catholic and the Non-Conformist chaplains held a service in the chapel. On the same day, at noon, the shell, under escort, was sent to Boulogne, where it was placed in a plain oak coffin, with wrought iron hands, through one of which was passed a Crusader’s sword from the Tower of London collection. While the coffin lay in the Chapelle Ardente in Boulogne Castle a company of French infantry mounted guard over it.
‘The next morning, November 9, carried by the pall-bearers, who were selected from NCOs of the British and Dominion troops, it was placed on a French military wagon and under the escort of French troops taken to Boulogne Quay, where a British destroyer was waiting.’