> An acquaintance performed a title search on another property going back to the 1100’s. They found a serious black and white error circa 1225 which voided the entire chain of claim. They did not report the error.
If this is the UK and the land-in-question is registered in the records held by the HM Land Registry, the black-and-white error is already void only recently-ish (Land Registration Act 2002 gave a 10-year "last chance" claims for very old deed errors, and the error you mentioned is now extinguished). Even if if was reported by your chap, HM Land Registry will just shrug because it literally has no legal effect now.
If this is the UK and the land-in-question is registered in the records held by the HM Land Registry, the black-and-white error is already void only recently-ish (Land Registration Act 2002 gave a 10-year "last chance" claims for very old deed errors, and the error you mentioned is now extinguished). Even if if was reported by your chap, HM Land Registry will just shrug because it literally has no legal effect now.