Think longer prison sentences and less freedom of movement for suspects.
ISIS offers tips on using vehicles for mayhem.
Attackers killed seven people in Saturday's incident.
The latest violence comes just days before a general election.
Police raised the death toll from seven to eight after recovering a body from the River Thames on Tuesday.
Andreea Cristea was a Romanian national who had been visiting London at the time of the attack.
"Talk to Londoners, talk and get a feel for this great city and how it’s come together."