TV show about Indiana Jones/ Holy Grail

Hi all

I was watching a show about real archeology vs. Indiana Jones.

There was a man in England who claimed that he has the Holy Grail, and showed a little alabaster cup that he claims he found by following "clues."

Anyone know what the Church has had to say about this person?

catedraldevalencia.es/en/el-santo-caliz_historia.php

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