Albion fans braved the freezing temperatures as Brighton’s under 21s beat League One Reading on penalties after extra time.
Shannon Ruth’s young side beat a Reading team to reach the last eight of the Bristol Street Motors EFL Trophy.
Albion had to defend for much of the 90 minutes but came out victors against a Royals side which had scored 20 goals in their last four previous EFL Trophy fixtures.
Ruben Selles’ side fielded nine players who had featured in their most recent League One match, a 3-2 win against Exeter City.
Harry Howell, 15, calmly tucked away the clinching spot kick as Albion won 3-2 on penalties.
Albion boss Ruth said: “Pride is the over-riding feeling - for the young players to perform on a night like that.
“That is probably the biggest game some of them have been in and to ask them to perform in that manner against a really strong Reading side.
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