A train company has blamed police after chaotic scenes at Brighton railway station following Brighton Pride's Britney Spears concert.
Many people spent the night on the beach on Saturday after police asked for the station to be closed.
People reported crushing and people passing out, with "thousands" stranded.
Govia Thameslink (GTR) said police needed to marshal crowds. British Transport Police (BTP) said it was aware of a number of issues.
Sussex Police has not yet commented to the BBC.