The 32-year-old man was arrested on suspicion of murder and is still in police custody.
Inquiries are ongoing and no further details are expected to be released today.
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Former Police Inspector Harry White told the inquests that he was told that fans entering the terraces should "find their own level."
A former police inspector has told the inquests he realised fans entering through an exit gate would head towards already crowded pens.
The man is thought to have tied himself to the bottom of the vehicle as it travelled from Calais to Kent.