The Occupy London movement has claimed that 20 protesters involved in a cycle demonstration yesterday were held on a bus overnight without arrest.
Under the Police and Criminal Evidence Act (PACE), a member of the public in police custody is entitled to a phone call and to talk to a lawyer. Occupy claims the group was denied these rights.
Police confirmed that more than 100 people were arrested last night but have not commented on claims that a group were held without arrest on a bus.
More top news
The Duke of Cambridge told crowds he was "delighted" to be back in the Commonwealth country.
When and where are they on, and how do they work?
What better, more dramatic spectacle has there ever been on American television?