77. Clay bunkers 14/7/21.
In the foreground are concrete blocks used to support the staging, these also appear in photo 3 of the Winget concrete plant. Other references in drawings refer to the blockwork in the buildings being ‘Wingate blocks’ so it appears that not only was the mass concrete made from ballast extracted on site (hence the reservoir named the ballast pit) but the blockwork was also cast on site.
