Tommy Robinson, whose real name is Stephen Yaxley-Lennon, was stopped by police at the Channel Tunnel in a luxury Bentley SUV.
He had thousands of pounds in cash, approximately £13k, and was driving to the Spanish tourist hotspot of Benidorm when the incident occurred.
The Act gives police the power to stop anyone passing through a UK port "to determine whether they may be involved or concerned in the commission, preparation or instigation of acts of terrorism).
Robinson denies failing to comply with the counter-terrorism powers during the incident.
Author's summary: Tommy Robinson on trial for failing to comply with counter-terrorism powers.