Not possible they were Fallow? A lot of menalistic fallow in West Sussex.????
Most likely !
I have been shooting and observing Roe on excellent areas for over 50 years and have never seen a black one.
There was a youngster with its mother on one area that had a broad black stripe along its back.
The pheasant syndicate brought in a private pack of hounds to hunt the Foxes and after that date I never saw the little one again.
White are also rare and as these mutations are recessive or sex-linked they will only appear when close relatives carrying those genes have mated.
HWH.