Why was holborn college blacklisted?

There's no evidence that Holborn College was ever officially "blacklisted" in any formal sense. The term implies a deliberate and coordinated action by a powerful entity to prevent the institution from operating or receiving support. There's no historical record of such an event happening to Holborn College.

It's possible you've encountered this claim in a specific context or have misinterpreted information. If you can provide more details about where you heard this, it might be possible to understand the origin of the misconception. For example, perhaps:

* Negative reputation: The college might have had a period of poor performance, financial difficulties, or negative media attention that damaged its reputation, making it less attractive to students or funding bodies. This could be informally described as being "blacklisted" but wouldn't be an official designation.

* Specific program issues: A particular course or department might have faced problems leading to sanctions or loss of accreditation, but this wouldn't necessarily apply to the entire college.

* Misunderstanding: The name might be confused with another institution.

To get a clearer answer, please provide more information about the source of your claim.