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You have a Short Term Study visa, which is not eligible for the scheme.
Indian and Chinese nationals can travel to Ireland and the UK using the following UK visas:
- all standard visitor categories where the maximum period for a single visit is six months
- Permitted Paid Engagement visas
The Short Term Study Visa is not a category of Standard Visitor Visa.
You must apply for an Irish visa to travel to Ireland, there is no other option.