Mods and Rockers: Brighton beach clashes remembered
14 May 2014 Last updated at 00:40 BST
In May 1964, rival gangs of youths clashed in the English seaside resort of Brighton on Bank Holiday weekend.
More than 1000 Mods and Rockers fought each other on Brighton beach, in scenes which were later immortalised in the cult film, Quadrophenia.
Alfredo Marcantonio, a former Mod, recalls the weekend's events.