World Rugby has announced three law changes in a bid to speed up the game and increase entertainment, it said on Thursday, along with a set of trials including 20 minute sanctions for red cards and a shot clock for scrums and lineouts.

Teams will no longer be allowed to choose a scrum from a free-kick under new laws to be rolled out across the game next season, with 20-minute red cards and shot-clocks for scrums and line-outs also to be trialled.