C&M 1-77 Works Managers Minutes 1945-57 held at DEFRA Records,Alnwick Almost 71,000 bombs containing tabun had been seized in Germany; these were stored in the open at RAF Llandwrog, near Caernarfon, until 1955/56 when, in Operation Sandcastle, they were transported to Cairnryan and scuttled at sea in three ships 120 miles north-west of Ireland.