(1) Vertical aerial photograph reference number
NMR NMR CPE/UK/2082 (F20) 3041-3 19-MAY-1947
(2) Vertical aerial photograph reference number
NMR RAF 543/2821 (F62) 0255-6 27-APR-1964
Further information about monuments may be obtained by contacting Archive Services, through the Historic England website.