Technology already exists to help create the Brexit stumbling block that is the much-doubted 'frictionless' border between the UK, Ireland and the rest of the EU.

A point homed in on by some covering Brexit discussions is the apparent sticking point of how to manage the Anglo-Irish border - not to mention our borders with the mainland Europe.

And in particular whether the technology could be made to manage that Holy Grail of borders - a 'soft', 'frictionless' line 'allowing freedom of movement of goods and services to the satisfaction of all countries.

Proposals made public by the Government in relation to the UK's future customs relationship with the EU rely heavily on technology, leading many to shake their heads it would even be possible.

In March a House of Commons report - The land border between Northern Ireland and Ireland  - cast doubt such technology said little progress has been made in identifying the technology necessary.

The scale of the task would indeed be enormous. Apparently Heavy Goods Vehicles cross the Irish border alone an estimated 2.12 million annually. That is 6,000 crossings a day along the 260 roads between the Republic and Northern Ireland.

But a company founded in Gloucestershire and still operating out of Gloucester, but now headquartered in London, is a specialist in such technology and at the very forefront of its delivery world-wide. Last year it was also linked with President Trump's much mooted 'wall'.

"With regard to a soft border the technology has already been deployed elsewhere and been proven to operate. The technology already exists," said Neil Hendry, of Digital Barriers, which has offices in Quedgeley.

That no detail had been announced so far did not surprise him.

"It is the policy which is usually agreed upon in these situations first. Once the strategy if defined then it becomes a case of looking at what technology you need," he said.

"The difficulty is how it (the technology) fits with the systems which are already in place."

The kind of technology supplied by the likes of Digital Barriers would not mean more border staff creating added tensions and cost, said Mr Hendry.

"The last thing we would want is for the tax-payer to end up footing a hefty bill. Our technology is about being cost-effective," he said.

"You would do your risk assessment, understand what the implications are, what risks might be to national security, for example. It is not about throwing money at something.

"It is quite the opposite to increasing manpower. The technology will be there to support."

Digital Barriers now has operations around the world and employs 130 staff.

Because of the nature of its work Mr Hendry would not talk about the detail of where the company operates, only to confirm it already helps manage borders around the world.

"We are engaged with various organisations from a global perspective. We have live systems deployed. I can't be specific about who those customers are. It is a reality."

"Our new mobile facial recognition technology, which we own, can also turn every CCTV camera into a facial recognition camera. We have developed body-worn devices too.

"There is a lot of confidence in this technology."

It is being introduced in airports in the United States and UK. Not the kind where you stand still in front of a camera and hand over your passport, the kind that identifies you on the move.

SmartVis Face: Identity Assurance for ride hailing services from Digital Barriers on Vimeo.

SmartVis Face: Live bodyworn camera on train from Digital Barriers on Vimeo.

According to the firm's website: "SmartVis Face provides a level of widely deployable facial recognition that has never before been seen. The system has been designed to meet the frontline operational requirements of defence, security and law enforcement agencies, as well as the broader security industry.

"SmartVis Face can even provide military-specification identity assurance using normal smartphones."

Couple that with number plate recognition is already established and in general use and you begin to understand how such a border might function.

Digital Barriers also has technology which can detect movement on the ground across open areas, called EdgeVis Shield.

Again, it was technology originally developed for military use.

Late last year the company was de-listed from the Stock Market in a deal valued in the region of £26 million.

Last year there was speculation it could become involved in President Trump's famous wall between the United States and Mexico - creating an electronic barrier alerting border staff using digital technology.

Did it get involved and does it operate on that American border?

We don't comment on anything like that. We do have a very active US offices though," said Mr Hendry.