Good Day Colin. Go to CWGC ** website WW1 records & all 3 Clarkes will be listed, place of death, date, & as much detail as was known , parents? wife ? etc

and age. It is then possible to download a medal card etc from National Archives , Kew , England.[small charge].

** Commonwealth War Graves Commission website. Even if no known grave --there will be a record of the which War Memorial record.