More than 1,100 small boat migrants have crossed the English Channel illegally since the new UK-France partial returns deal came into operation during the week.
GB News provisional figures show 281 arrived on five small boats throughout Sunday.
The last of those made it to Dover harbour on the Border Force vessel Hurricane just before 6pm.
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Home Office official figures have confirmed the GB News assessment yesterday that 435 migrants made the crossing in seven inflatable rafts on Saturday.
So far this weekend, 716 migrants have crossed from France.
It takes the total who have arrived since the new returns deal was operationalised last Wednesday to 1,119.
So far this year, 26,556 small boat migrants have made the illegal voyage across the Channel.
GB News understands 716 migrants have crossed from France
|GB NEWS
That figures is almost 9,000 ahead of the 17,638 who arrived at the same point last year.
Maritime sources have told GB News that weather conditions in the English Channel are expected to remain good for most of the week ahead.
It is likely to see at least an additional 1,000 cross by mid-week, according to one source.
The first detentions under the 'one in one out' scheme came as people arrived in Dover on Wednesday, the first day the pilot scheme came into force.
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Footage published by the department on Thursday showed some of those who were detained arriving and being medically assessed at Western Jet Foil in Dover.
Video also showed men taken to Manston processing centre, wearing dark grey tracksuit jumpers and bottoms, being screened by Border Force officers.
Home Secretary Yvette Cooper said: "Yesterday, under the terms of this groundbreaking new treaty, the first group of people to cross the Channel were detained after their arrival at Western Jet Foil and will now be held in detention until they can be returned to France.
"That sends a message to every migrant currently thinking of paying organised crime gangs to go to the UK that they will be risking their lives and throwing away their money if they get into a small boat."
The Home Secretary has previously said the accord is not a “silver bullet” to stop small boat crossings, but marked a step change as migrants will be sent back across the Channel for the first time.
Ministers have rejected criticism that the returns deal leaves open a loophole for human rights laws to be exploited for migrants to avoid deportation.
Efforts to crack down on illegal working and remove migrants with no right to be in the UK from the country are continuing as ministers grapple to curb the crossings.