Not clear who owns these sites or what the access situation is. Whole of Bradwell Dale is an SSSI, including these entrances.
(1950) , British Caver Vol.21. p.22., ,
(1964) , B.S.A. Cave Science Vol.5. No.36., Survey., British Speleological Association
(2010) , Caves of the Peak District, p. 63, DCA