On Friday star Emma Thompson joined activists at Oxford Circus, at the heart of one of the capital's most popular shopping districts, to read poetry praising Earth's bounties.
"As of 10:00 a.m. on Saturday. more than 718 people have been arrested since Monday".
Protesters stood by the tunnel that leads to Terminals 2 and 3 at the airport, but all roads around the roundabout remained open.
But Scotland Yard said enquiries were being made to identify those involved.
Environmental activists in the United Kingdom took their protest to Heathrow Airport on Friday after days of demonstrations caused road closures and transport chaos across London.
Home Secretary Sajid Javid, Britain's interior minister, condemned the demonstrations saying protesters "do not have the right to break the law and significantly disrupt the lives of others".
A Heathrow spokesman said: "We are working with the authorities to address any threat of protests which could disrupt the airport".
Ireland set to be warmer than Barcelona, Lanzarote, and Athens this weekend
Rain showers become more widespread, with temperatures cooling to around 54 degrees by daybreak Friday . Despite more clouds Sunday , highs will be similar to Saturday due to the much warmer start in the 50s.
Napoli vs Arsenal: Match preview, betting odds and prediction
In all the different moments of the game we were compact and defending well and looking for chances. They want to do something important", said Emery.
Trump Predicts Biden, Sanders to Be Democratic Finalists in Presidential Race
" Bernie Sanders and wife should pay the Pre-Trump Taxes on their nearly $600,000 in income", the president wrote . She now says she believes that Sanders would have defeated Trump in her state in 2016.
As the day went on, police stayed at the scene in vans, but there were few officers on the street.
Ken Marsh, chairman of the Metropolitan Police Federation, told BBC Breakfast on Friday that protests had been "very, very difficult" for the force because it was an "alien" situation for majority.
Officers have also been asked to work 12-hour shifts, while the Violent Crime Task Force has had leave cancelled.
This week, British law enforcement detained three environmental activists from the same group after they glued themselves to a train at London's Canary Wharf station, causing a delay to the Docklands Light Railway.
Metropolitan Police surround Extinction Rebellion demonstrators on Waterloo Bridge in London.
Extinction Rebellion co-founder Gail Bradbrook said "more people are joining us all the time".
The group, calling itself Extinction Rebellion Ireland, urged the Government to declare a climate and ecological emergency.