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Train and travel lodge is likely best.

Options.

Train there and back same day - can they fit interview around your travelling times.

Query if you can claim travel expenses back, some HR departments allow this but don't advertise the fact.

Telephone interview (I don't like them, prefer in person).

Unfortunately interviews do cost a bit in both time and money.

So make sure you are fully prepaid.

Fully covered off on requirements, have all info to back up and qualifications or experience.