I have seen it claimed that this most, if not all, are buried in a long trench very close together and rather than try to squeeze in single headstones they opted for double headstones. A partly similar precedent was set at Guards Grave, Villers Cotterets, which is a communal burial. The position of those buried there is unknown but they are commemorated on double headstones arranged around the boundary wall. Needless to say, many now think that the headstones mark graves and the inadequate CWGC cemetery description does nothing to clarify matters.
