The Liberal Democrats will allow Premier League and Championship clubs to introduce safe standing at stadiums, under plans in its 2015 general election manifesto.
In the wake of the Hillsborough disaster in 1989, clubs in England's top two divisions were required to ensure all fans were seated at matches.
The party says rail seats, which can be locked in an upright position to allow fans to stand and lean against a barrier, should be considered in English football, following examples in leagues across Europe.
It insists it is not campaigning for a return to open terracing.
The Football Supporters' Federation has long campaigned for the introduction of safe standing, claiming it improves the atmosphere at games and cuts ticket prices.
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