Adrodd fel Amhriodol
Testun Gwreiddiol (Anodiad: EPW061243 / 2127747)
'
Open trench air raid shelters. These began being dug in parks in 1938. These were essentially for people caught in the open to take cover when the sirens sounded. In 1939, the Government began to build shelters in brick and concrete and the open trenches were covered in steel of concrete. '
