Rail operator Southern has apologised after crowds of football fans were left "stranded" when trains were cancelled at short notice after a match.
Chief executive of Brighton & Hove Albion football club Paul Barber said the disruption was "unacceptable" and he wanted a full explanation.
The Seagulls had played Aston Villa in front of a capacity crowd at Falmer's Amex stadium on Friday.
Southern said it was unable to crew its normal football service and apologised.
'Chaos'
Fans took to Twitter to report journeys of more than two hours from Falmer to Newhaven and Lewes.