Border Security, Public Safety and the Challenge of the Common Travel Area

Recent reporting has once again brought attention to the Common Travel Area and the security challenges it can create for the United Kingdom. 

The Common Travel Area allows movement between the UK and the Republic of Ireland. It is an important and long-standing arrangement, shaped by political, historical and practical considerations. However, it also presents a difficult security question. How can the UK maintain an open border arrangement while also ensuring there is sufficient visibility over individuals who may present a risk? 

In a recent interview with Radio 5, David Wood, CEO of GSA Global (former Director General of Immigration Enforcement at the Home Office), explained how individuals seeking to enter the UK unlawfully have sometimes used routes through Ireland. Once in the Republic of Ireland, an individual can travel north into Northern Ireland without border checks. From there, they may be able to travel onwards to other parts of the UK by ferry. 

This is not a new issue. It has existed for many years. What has changed is the wider risk environment and the level of public concern when serious incidents raise questions about how individuals entered the country and what checks were possible. 

Why the Common Travel Area creates a security challenge 

The Common Travel Area is designed to allow free movement between the UK and Ireland. In practice, this means there are no immigration controls between the Republic of Ireland and Northern Ireland. 

That creates a difficult balance. On one hand, the open border is politically and practically important. On the other, it limits the ability of authorities to conduct standard immigration checks at the point of movement between north and south. 

David Wood explained that this is not simply a question of staffing. It is also a legal and political issue. There is no border control regime between the Republic of Ireland and Northern Ireland. Similarly, movement from Northern Ireland to Great Britain is movement within the United Kingdom, which makes full border style checks highly sensitive and difficult to implement. 

This means the UK cannot simply apply a conventional border control model to every part of the route. 

The risk is not always at the border itself 

One of the key points raised in the interview is that the challenge often begins before an individual reaches the UK. 

If someone can gain entry to Ireland through weaker controls, different visa rules or limited detention capacity, they may then be able to travel onward without scrutiny. This creates a potential gap between immigration policy, border enforcement and public safety. 

The issue is not that everyone using such a route presents a risk. That would be neither accurate nor proportionate. However, where there is limited visibility over those entering, there is also a reduced ability to identify individuals with a violent, criminal or concerning background. 

That is the security challenge. It is not only about numbers. It is about whether the right people can be identified early enough, and whether the system has enough information to act before risk reaches the public. 

Intelligence led checks are important, but limited 

David Wood noted that checks can take place on ferry routes where there is intelligence or reasonable suspicion. Officers may carry out spot checks where there is a lawful basis to do so. 

This is important, but it is not the same as a routine border control. Intelligence led checks depend on information, indicators, resources and judgement. They are useful where risk is known or suspected, but they are less effective when the concern is not yet visible. 

This is a familiar challenge across the wider security landscape. Whether dealing with border security, insider risk, due diligence or protective security, the central question is often the same: 

• What do we know? 

• What do we not know? 

• Where are the blind spots? 

• What indicators should trigger further scrutiny? 

• Who has responsibility for acting on those indicators? 

When visibility is limited, organisations and governments are forced to rely more heavily on intelligence, information sharing and risk-based intervention. 

Public safety depends on joined up information 

Border security does not sit in isolation. It depends on coordination between agencies, countries, law enforcement, immigration authorities and security services. 

Where routes cross jurisdictions, the challenge becomes more complex. Information may sit in different systems. Legal powers may differ. Political constraints may limit what can be done. Operational responsibility may be split between multiple bodies. 

This is why public safety depends on more than checks at a single point of entry. It requires a joined up approach that looks at the full route, the wider intelligence picture and the individual risk profile. 

For the UK and Ireland, continued cooperation is essential. Without shared visibility, common standards and effective information exchange, gaps will remain difficult to close. 

The wider lesson for organisations 

Although this issue sits within national border security, there is a wider lesson for organisations. 

Many security failures occur not because of a lack of controls, but because controls do not connect properly. A person, supplier, contractor or third party may pass through one part of a process without the full risk being understood elsewhere. 

This is directly relevant to corporate due diligence, insider risk, security vetting and protective security. Organisations often need to make decisions about who to trust, who to give access to, who to appoint, who to partner with and who may pose a hidden risk. 

The same principles apply: 

• Understand the route of access 

• Identify where visibility is weak 

• Look for indicators of concern 

• Share information between teams 

• Escalate risk before it becomes a live incident 

• Use intelligence to support proportionate decision making 

In both national security and corporate security, the greatest risks often emerge where there is a gap between systems, jurisdictions, responsibilities or assumptions. 

A risk-based approach is essential 

There is no simple solution to the Common Travel Area challenge. The political, legal and operational realities are complex. Routine border checks between Ireland and Northern Ireland are unlikely to ever be implemented, and full checks between Northern Ireland and Great Britain would raise serious constitutional and practical issues, and will not happen. 

That means the focus must be on a risk-based approach. 

This includes stronger cooperation between the UK and Ireland, better use of intelligence, improved information sharing, targeted enforcement, and clearer understanding of the routes that may be exploited. A similar approach being taken to border controls makes both countries safer. 

It also means recognising that public safety depends on early visibility. Once an individual has entered the country and disappeared from view, the challenge becomes much harder. 

Conclusion 

The Common Travel Area remains an important arrangement, but it also creates security challenges that cannot be ignored. 

David Wood’s comments highlight the difficulty of managing an open border environment while protecting the public from those who may seek to exploit gaps in visibility. The answer is unlikely to be a single policy change or a simple increase in checks. The issue requires coordination, intelligence, proportionate enforcement and a clear understanding of where risk can enter the system. 

For organisations, the lesson is equally clear. Whether the concern is border security, insider risk, third party exposure or due diligence, trust cannot be assumed simply because someone has passed through one part of a process. 

Security depends on visibility, context and the ability to identify indicators of concern before they escalate. 

At GSA, we help organisations assess these risks in a practical and proportionate way, supporting clients with due diligence, investigations, security vetting, insider risk awareness and protective security. Our focus is on helping organisations make informed decisions about people, partners and potential threats before those risks become critical.