A number of directors of Ulster Bank, Limited appear to have been appointed on the day of its incorporation, the longest having served for 138 years since 1-Oct-1867. Please set the appointment date to NULL for them.
You (CH) could catch some of these by doing a global search for directors serving more than 80 years - there would be very few legitimate appointments.
On further inspection I have found this to be a problem only with companies with numbers beginning “R0”, that is “Northern Ireland Company (pre partition)”. I suspect that wherever the director’s appointment date is unknown, the system has set it to the incorporation date of the company, which is often before they were born.