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Pulling the public holiday data via visual basic webrequest is no longer available


I have a desktop visual application which makes a call to public holiday listings from
I am using System.Net.WebRequest.

It used to be working fine for a couple of years, until very recently. It is now coming up with the error remote server (403) forbidden.

If I copy paste the request address into the normal google chrome, it still gives me the result, but not from the webrequest function.
How do I authenticate my webrequest to be permitted to read it again?

The url I want to read from the webrequest is

Which is the list of public holiday for 2022.

Thank you for your help,