Bismillah,
If one knows that a product is fried with non-halal meat, then it would become najis (impure) and haram to eat. If one didn't know then there is no sin upon them.
May Allah grant you success
Seyed Ali Shobayri is of mixed Iranian and Scottish descent who found the path of the Ahlul Bayt (a) by his own research. He holds a BA in Islamic Studies from Middlesex University through the Islamic College of London. He also studied at the Hawza Ilmiyya of England and continues Hawza and Islamic studies with private teachers.