Animal Rising, the animal rights group that disrupted the Grand National, are now planning to halt this weekend's Epsom Derby.
It comes after the Jockey Club were granted a High Court injunction in a bid to prevent protesters from disrupting the derby. April's Grand National was delayed after hundreds of activists attempted to gain access to the course.
This prompted the Jockey Club, who own both the Epsom and Aintree racecourses, to take legal action arguing that such protests "compromise the safety of equine and human participants and all racegoers". And High Court judge Sir Anthony Mann granted an injunction stating that activists who disrupted the event could be subject to proceedings for contempt of court, which may lead to a fine and/or imprisonment.