A Mafia expert from a leading university has warned Felixstowe will be among those ports where crime is most likely to flourish.

Dr Anna Sergi, from the University of Essex, at Wivenoe near Colchester, has written an in depth report about crime at ports around the world and has warned easing of border controls could make the UK an even more attractive destination for illicit goods and drugs, especially post Brexit.

Ports are already known to be hotspots for smuggling and the criminologist found and warned in her 174 page report that Government proposal for freeports, where normal tax and custom rules do not apply, could lead to a increase in crime.

"The current UK proposal for freeports is not addressing a number of issues that relate to organised crime in ports," warned Dr Sergi. "Indeed, freeports yield a number of criminal opportunities for illicit drug trade, counterfeit trade, money laundering, tax evasion and evasion of custom duties. In particular, the already existing risk profiles of a port are augmented by the existence of free trade zones."

Felixstowe is the UK's largest container port and Dr Sergi, who holds a PhD in Sociology with specialisation in Criminology and is regarded leading expert of crime families and the mafia, warned it will be the most affected in terms of volume of cargo coming in from Europe, potentially leading to less physical checks on containers post-Brexit.

Dr Sergi said: "The current situation of intelligence sharing between Border Force and the National Crime Agency (NCA) in the port and local police forces outside the port is not functioning across the whole country.

"With Brexit, Felixstowe particularly will be the most affected port in terms of volume of cargo coming from Europe which will likely be subjected to more scrutiny post-Brexit.

"This means that criminal groups usually moving things via sea through Europe will have to adapt to this condition by changing routes and using maybe other ways of transport, by road for example, and authorities will be slow in catching up.

"The increased volume of control in Felixstowe or Harwich might also mean more superficial control, already now we check less than 5% of containers daily, after Brexit with more bureaucracy we could end up physically checking even less."

Dr Sergi found drugs to be a major issue at all the ports she visited, and, unsurprisingly, that is where most of the law enforcement is placed.

"If cocaine production increases at the rate that it has increased in the past years (quadrupled in Colombia in the past four years) and the demand for cocaine in the UK is also increasing, cocaine trade to the UK will certainly not stop.

"The likelihood that the UK's borders will be an even more attractive destination for illicit goods, such as cocaine, especially after Brexit, is a realistic concern," she added.

Dr Sergi is concerned the lack of data about the true levels of crime associated with ports and suggested security networks should be established around ports with all the different authorities working closer together.

A Home Office spokesman said: "Illegal drugs devastate lives and communities. Working with our partners at the NCA we will continue to do all we can to arrest and prosecute those involved in drug smuggling," the spokesman said.

"Border Force officers continue to play a key role in tackling smuggling, detecting illegal immigration, disrupting serious and organised crime and helping to prevent the threat of terrorism, as well as protecting the UK's revenue and contributing to the nation's prosperity and growth. They are well equipped to combat immigration crime and detect banned and restricted goods that smugglers attempt to bring into the country."