Problem: Article: The UK Border Agency withdrew its entire staff of three officers from Stranraer in 2010.
The move was raised by Dumfries and Galloway SNP MP Richard Arkless during the first Scottish Questions since the general election.
It was met with a swift rebuke from Scottish Secretary David Mundell.
The clash followed a call for assurances on the policing effort in preventing illegal immigrants from being smuggled through ports into mainland Britain.
Mr Arkless said: "Given the security concerns raised by the honourable member and the further cuts proposed to Scotland's budget, will the Secretary of State commit to revisit his government's decision to withdraw Border Agency staff from the port of Stranraer in 2010?"
In response, Mr Mundell, who represents Dumfriesshire, Clydesdale and Tweedale, welcomed Mr Arkless to the Commons but rejected his point.
He added: "I think the most unhelpful contribution to policing in Stranraer and surrounding areas has come from the Scottish government's decision to get rid of Dumfries and Galloway police force against the wishes of local people."
The move to withdraw the Border Agency staff was condemned by a senior police chief at the time.
Dumfries and Galloway chief constable Pat Shearer said he had already been forced to release illegal immigrants because of a lack of support.
Answer: [[Two south of Scotland MPs have clashed in the House of Commons over the issue of security at the Irish Sea ferry ports at Cairnryan.]]

Problem: Article: RFU rules stipulate players must play their club rugby in England to be eligible for international selection.
Armitage, 30, had been linked with a return to England after Wasps showed interest in signing the former European Player of the Year.
He won five England caps in 2009-10 but has played in France since 2011.
His departure from Toulon ends a trophy-laden spell with the star-studded side that included three successive European Champions Cup titles.
His consistent excellence in their back-row led to him being voted Europe's best player in 2013-14.
Despite pressure on English rugby's governing body to relax its selection criteria after England's poor showing at Rugby World Cup 2015, the RFU extended its policy to prevent an exodus of leading players from the domestic game.
Armitage's brother Delon - who won 26 caps at full-back for England before similarly moving to France in 2012 - is also leaving Toulon, but to join Lyon.
For the latest rugby union news follow @bbcrugbyunion on Twitter.
Answer: [[Former England flanker Steffon Armitage is to leave Toulon and join their French rivals Pau, ruling out a return to the national side.]]

Problem: Article: Scans of 25 first-time mums showed these structural brain changes lasted for at least two years after giving birth.
European researchers said the scale of brain changes during pregnancy were akin to those seen during adolescence.
But they found no evidence of women's memory deteriorating.
Many women have said they feel forgetful and emotional during pregnancy and put it down to "pregnancy" or "baby" brain - and, it seems, with good reason.
Pregnancy is characterised by extreme surges of sex hormones and involves drastic physiological and physical changes in the body, the researchers say.
During those nine months, women experience a flood of oestrogen which is greater than for the whole of the rest of their lives.
Yet research on the effects of pregnancy on the human brain is scarce.
This study, from researchers at the Universitat Autonoma de Barcelona and Leiden University and published in Nature Neuroscience, looked at the brain scans of women before they became pregnant, soon after they gave birth, and two years later, to see how the brain changed.
And they compared these women's brains with those of 19 first-time fathers, 17 men without children and 20 women who had never given birth.
The researchers found "substantial" reductions in the volume of grey matter in the brains of first-time mothers.
The grey matter changes occurred in areas of the brain involved in social interactions used for attributing thoughts and feelings to other people - known as "theory-of-mind" tasks.
The researchers thought this would give new mothers an advantage in various ways - help them recognise the needs of their child, be more aware of potential social threats and become more attached to their baby.
Just by analysing the brain images, computers were able to pick out the women who had been pregnant.
In one task, women were shown pictures of their own babies and other babies and their brain activity was monitored.
The parts of the brain which lit up when they saw pictures of their own babies closely matched the areas where grey matter had been reduced or "fine-tuned" during pregnancy.
The same areas did not light up when pictures of other babies were viewed.
Elseline Hoekzema, study author and postdoctoral researcher at the Institute of Psychology at Leiden University in the Netherlands, said: "We can speculate that the volume reductions observed in pregnancy represent a process of specialisation or further maturation of this Theory of Mind network that, in some way, serves an adaptive purpose for pending motherhood."
The study found that pregnant women were all affected in similar ways, regardless of whether they conceived naturally or underwent IVF.
And there were no changes in first-time fathers' grey matter in the study when their brains were monitored before and after their partners' pregnancy.
The research team also found no major changes in white matter in the brain.
Answer:
[[Pregnancy reduces grey matter in specific parts of a woman's brain, helping her bond with her baby and prepare for the demands of motherhood.]]