From the linked to the Humanist article -
"But the US fears around free speech in the UK are unfounded. Safe access zones do not stop people from protesting against others having abortions, or from praying that they don’t. They just prevent them from doing so in a way likely to cause others alarm or distress, or that takes away their privacy. They simply require protestors to move 150 metres down the road."
What they want is to get up close to the clinic and anyone attending it or working there.
It also refers to Livia Tossici-Bolt as a "seasoned anti-abortion campaigner"
And that Adam Smith-Connor, another Bournemouth protestor, was referred to by Vance in his Munich Security Conference speech.