Kenneth Glad
A plan to physically connect Great Britain and Northern Ireland keeps resurfacing in political and engineering discussions. This time, attention is less about ambition and more about whether it makes any sense financially.
The proposal would create a fixed crossing over the North Channel, allowing vehicles to travel directly between mainland Britain and Northern Ireland.
As reported by the Daily Express, the idea has circulated for decades, often gaining traction when trade or transport links come under pressure.
On paper, it sounds simple enough. Build a bridge or tunnel, remove the need for ferries, tighten economic ties. But the reality is far messier.
A project defined by its staggering price
A government-commissioned feasibility study in 2021 laid out the scale of the challenge.
Led by Network Rail chairman Sir Peter Hendy, it estimated a bridge could cost around £335 billion.
A tunnel would still demand roughly £209 billion.
Either figure would place the project among the most expensive infrastructure efforts ever considered in Europe.
And the cost is only part of it.
Dangerous waters and hidden risks below
The stretch of sea involved is notoriously difficult. Strong currents move through the North Channel, and the seabed is uneven and deep in places.
Then there is Beaufort’s Dyke. This trench, used for dumping munitions after both World Wars, contains vast quantities of unexploded material.
Building anywhere near it would require extreme caution, likely slowing work and pushing costs even higher.
Architect Professor Alan Dunlop offered a far more optimistic view in 2018, describing the idea as “feasible” and suggesting it could help ease post-Brexit trade tensions, according to the newspaper.
He proposed two main routes:
One would stretch roughly 27 miles between Portpatrick in Scotland and Larne in Northern Ireland.
Another, much shorter, option would run about 12 miles from the Kintyre peninsula to County Antrim.
Big ambitions, but no clear path forward
Dunlop called it a “Celtic bridge” and put the cost at around £15 billion. That figure now looks strikingly low compared with the later official projections.
The Hendy review did not say the project was impossible. It made clear the engineering could be done. The problem is the price. The report concluded it was “impossible to justify” under current conditions.
There is still some room for change. Advances in transport technology, particularly autonomous systems, could alter how such a crossing is designed in the future.
But right now, the gap between vision and reality is enormous. Even before construction begins, the numbers alone are enough to stop it in its tracks.
Sources: Daily Express
