Disqualified directors, terrorists and drugs traffickers are all listed as company directors at Companies House, a trawl through the body's archive has found.

Nearly 4,000 high-risk individuals have been found to be listed as company directors in the UK's register of company directors and secretaries.

Datanomic, a data protection software company, came up with the list after checking the names of 750,000 high-risk individuals – from the high-risk database firm, Worldcheck – against the 6.8m directors listed at Companies House.

A final analysis of the results also threw up matches for 1,504 disqualified directors running current UK companies despite the existence of the Register of Disqualified Directors. Some of the disqualified directors are also operating companies from prison.

The results also revealed 154 directors involved in financial crime, 13 who are either wanted by Interpol for terrorism or associated with terrorist groups and activities, 37 narcotics traffickers and almost 1,000 domestic and foreign politically exposed persons and hundreds from other high risk categories.

Worldcheck CEO David Leppan said the problem is that Companies House is not required to screen applicants, leaving the door open for terrorists money launderers, narcotics traffickers and many others to actively participate in the UK economy without any checks or balances.

'These results serve as a grim reminder as to the dangers of complacency. It is clearly time for the UK government to broaden the qualifications for registering companies and directorships as a first defense against a range of criminal and terrorist activities,' said Leppan.

Datanomic's CEO Jonathan Pell, said it was ridiculous that Companies House did not screen its customer base for known criminals, terrorists, as is required by other regulated companies.

'It seems absurd that Companies House, which is an executive agency for the Department for Business, Enterprise and Regulatory Reform isn’t required to do so. If the UK government is serious about prevention of criminal and terrorist activities, it should take a closer look at how directorships in UK companies are being used,' said Pell.

Among those hiding in the register at Companies House are:

- A director of a UK company who is allegedly a representative of Hizb ut-Tahrir in the UK .

- Another individual, wanted by Interpol for terrorism and forgery, is listed in the register as director of 12 UK companies.

- Two individuals, both suspects in foiled UK terror plots, are listed by Companies House to be Directors of several UK companies.

- A convicted fraudster, who served a five-year jail sentence for selling false insurance, is listed as director of two companies.

- Convicted criminals including a money-launderer and a fraudster sentenced to 2 years in jail for tax fraud.

- An individual accused of violating the US state securities law by defrauding investors of approximately US$34million.

- A narcotics trafficker who appears on the USA Treasury OFAC list, and is the director of three companies in the UK .

- An individual who was sentenced to 16 months in jail following the seizure of narcotics is currently secretary of a UK company.

- A director of a UK-based company wanted by Interpol on fraud charges in Moscow .

- An Eastern European General who is facing United Nations war crimes charges is registered as the director of one active UK registered company.

- It was also found that the following five foreign countries had the most PEPs operating companies in the UK , and hence posed the highest PEP risk: the Russian Federation (14), Germany (13) South Africa (12), Italy (10), and India (10).