Organisers of The Open are engaging with protest groups to mitigate the risks of disruption at Royal Liverpool this summer.
A man wearing a 'Just Stop Oil' T-shirt interrupted the World Snooker Championship match between Robert Milkins and Joe Perry on Monday evening by jumping on to one of the tables and tipping orange powder over the cloth.
It was the second time in three days that a major domestic sporting event had been disrupted after 118 people were arrested at Aintree on Saturday as they tried to scale the perimeter fence ahead of the Grand National.
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