Here's a summary of the latest developments:

• More than 700 migrants have left the Jungle so far on 17 buses. There were an estimated 8,143 migrants in the camp
• The Calais police commissioner Patrick Visser-Bourdon has told migrants he may not have enough buses to take them away from Calais on Monday
• PA news agency has reported some scuffles as people leave the camp and queue for the coaches, but most remained calm
• Those on the coaches are due to be taken to refugee centres across France
• The UK has "paused" the transfer of some migrant children from Calais to Britain "due to planned operational activity" in Calais, the Home Office has said. It is understood the pause will last 24 hours.

Our main story will continue to be updated with the latest from Calais - read more here.

Image source, Reuters

Some migrants are leaving the long queue of people waiting to be processed and transferred, says French journalist Antonin Sabot.

One young Sudanese told him he was exhausted.

The atmosphere is tense and there is some pushing and shoving, Mr Sabot says.

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The UK authorities say they have halted the transfer of some migrant children from Calais to Britain.

It is understood the pause will last 24 hours.

"Due to planned operational activity in Calais and at the request of the French authorities, we have reluctantly agreed that the transfer process will be temporarily paused," the Home Office said in a statement.

Children and teenagers have been coming over the past week - some with family in the UK and others judged to be vulnerable.

French officials say about 200 children have left Calais for the UK.

Earlier today, 20 child migrants arrived at a residential centre in the south of the UK.

The youngsters - who are all believed to be male and under the age of 18 - arrived by bus at about 03:00 local time (02:00 GMT). 

It is believed the migrants - originally from Afghanistan, Sudan and Syria - will receive medical checks before decisions are made about what will happen to them next. 

A local MP has said up to 70 youngsters could be brought to the North Devon region in total. 

Read more.

Simon Jones reports on the "chaotic" scenes at the Calais "Jungle" camp.

The NGO Refugee Info Bus says there has been some pushing and shoving as migrants are turned away from queues.

PA news agency reports a few punches were thrown in scuffles but most people remained calm.

Riot police intervened to prevent others from joining the scuffles.

Image source, Getty Images

Calais Police commissioner Patrick Visser-Bourdon is telling migrants he may not have enough buses to take them away from Calais today. 

He says they should consider going back to the Jungle and returning tomorrow.

Some migrants in Calais have told journalists they will continue to try to reach the UK rather than be transferred elsewhere in France.

One Syrian told a Guardian journalist that a group of Syrians left the Jungle to sleep rough in the area.

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The prefect of the Calais region, Fabienne Buccio, has told local Radio 6, external that the dismantling of the camp is going "very well", BBC Monitoring reports.

But the mayor of Calais, Natacha Bouchart of the opposition Republicans party, has complained, external that the government has given the city "no guarantees, or shown us any plan that confirms that the difficulties we've had for the last three years are at an end".

French journalist Axel Roux has been talking to Yannick Le Bihan, France director for the French NGO Medecins du Monde.

He says (in French) that his main concern about demolishing the Jungle camp is what happens next.

The Sangatte camp was a refugee camp opened by the French authorities near Calais in 1999. At its peak it had a population of 2,200. It was closed in 2002. Read more.

Image source, AFP/Getty Images

The British MP for Dover - on the other side of the Channel from Calais - Charlie Elphicke has said it is "really important" for the resettlement of lone child refugees to continue, but backed the closure of the camp.

He told the BBC's Victoria Derbyshire, external show:

One man in the Jungle told a Guardian journalist about his reasons for accepting help to return to Afghanistan...

... but Amnesty International's deputy Europe director said people in his position should feel they have a better range of options.