Not sure there is a member on here by that name?Do you know where he’s based , I’ll contact him , his users “DS deer management” right ?
Maybe he meant @RCS Deer Management?
If so, I can vouch that he really knows what he's doing.
You could also perhaps try the BDS mentoring scheme? That's a very affordable option for a day's guided stalking, if you can get to their ground in Norfolk. Contact BDS, or @Mouse on here (my daughter). She coordinates the scheme and is one of the guides.