A man will appear before magistrates in Birmingham on Monday in connection with an alleged robbery at Stanley's Casino in Star City, Birmingham, on 6 March.
The 33-year-old has been charged with robbery and possession of a firearm with intent to commit robbery.
He was arrested at Euston train station in London, on Thursday evening, and questioned by detectives.
A 27-year-old man who was arrested at the same time is still being interviewed by West Midlands Police.
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