Penodwyd Syr Hopkin yn gynghorydd arbenigol Llywodraeth Cymru ar brosiect coffau y Rhyfel Byd Cyntaf, ‘Cymru’n Cofio - Wales Remembers 1914-1918’.
Sir Hopkin was appointed as the Welsh Government’s expert adviser on the First World War commemoration project Cymru’n Cofio – Wales Remembers 1914-1918.