A government-funded inquiry is calling for the DNA profile of people, who have not actually been convicted of a crime, to be removed from the national DNA database. Britain has the largest DNA database in the world. There are over 4.2 million people on it. But a million of those people have never been convicted of anything. And 50,000 of them are children. Millions of these profiles are given to private companies without the consent of individuals. Yet the DNA database has mushroomed with no basis in legislation. And members of parliament have never been given the opportunity to vote on it.

Perhaps, if the database did have some legislative foundation, there would have been a chance to put in place the safeguards which are lamentably lacking from the current system. Forty per cent of black men are on it, but only 9% of white men. This bears no correlation to relative arrest or conviction rates. And the police seem determined to hold on to their power to put people on the database in a completely arbitrary way.

I saw this when a friend had her 14-year-old daughter's DNA sample taken because she happened to get a lift home in a car which was stopped by the police. No one was charged, no offence had been committed, but the police took it upon themselves to take a DNA sample from her. They tried to suggest to the parents subsequently that it was mandatory for them to do this. It was only when I took up the case with government ministers that they admitted that it was at their own discretion. Six hundred and forty five rapists have been caught using the DNA database. But I doubt that many of them were 14-year-old girls. Yet the police had the power to criminalise my friend's daughter with no appeal and no safeguards.

Professor Sir Alec Jeffreys, the man who actually invented DNA fingerprinting, is concerned. He says:

The national DNA database is a very powerful tool in the fight against crime, but recent developments such as the retention of innocent people's DNA raises significant ethical and social issues. The real concern I have in the UK is what I see as a sort of 'mission creep'. When the DNA database was initially established, it was to database DNA from criminals so if they re-offended, they could be picked up. Now hundreds of thousands of entirely innocent people are populating that database.

Professor Stephen Bain, a member of the Human Genetics Commission, said much greater consideration had gone into databases put together for research purposes than for the national DNA database used for forensic purposes.

Lord Justice Sedley has said that the police are engaging in crude ethnic profiling. He says this is indefensible and it would be fairer to include everyone, innocent or guilty. This would be a huge step. But there is no doubt that a proper debate on the uses and abuses of the DNA database is long overdue.