There are about 900 Jamaicans and nearly 600 Nigerians serving prison sentences in Britain

It costs around £38,000 a year to incarcerate someone in a British jail. If all the Jamaicans and Nigerians had been transferred immediately after being convicted to prisons in their home countries, it would have saved the British Exchequer £57 million a year. And if all the 11,127 foreigners who are now serving sentences in British prisons were to do their time in the jails of the countries where they were born, the annual savings would be more than £420 million. Of course, the British would not have to worry about these sort of costs if they had kept the troublesome foreigners out of the country in the first place.