Thursday, September 30, 1999 Published at 06:18 GMT 07:18 UK
New fears over GM crops
The tests showed pollen travelled far beyond recommended isolation distances
The UK Government says it will review the distances it allows between genetically-modified (GM) and other crops after tests showed GM pollen could travel as far as 4.5 kilometres (2.7 miles).
But a monitoring exercise set up by the pressure group Friends of the Earth and the BBC's Newsnight programme found pollen travelled up to 20 times those distances.
Pollen carried by bees had reached beehives at distances between 500 metres and 4.5 kilometres from the site.
The Environment Minister, Michael Meacher, told the BBC: "I accept we need to look at it again. They may need to be larger than they are at the present time.
"We need to look at this evidence which has been presented and make a decision.
Although it has been known for a long time that pollen can travel many tens of kilometres, this is the first study looking specifically at the movement of GM pollen. It will be useful in assessing the impact of the farm-scale trials now underway in the UK. The work was carried out during June and July by the national Pollen Research Unit and a bee specialist.
"The commercialisation of these crops should not take place until we have enough information to make decisions about whether they will have an effect on biodiversity and in our countryside," said Brian Johnson of English Nature.
"We haven't reached that point yet and we won't really reach that point until the end of the field scale trials, so our view is that the decision needs to be made then, and not before then."
The study is the first to find GM pollen in beehives. Honey packers do their own tests for it, but none has yet been discovered.
"Of course, if it gets more widespread and extends beyond more than just a few trial sites, then it would be more of a concern."
Friends of the Earth is calling for the government to abandon the whole GM trials programme.
But Mr Meacher argued that continuing the trials was the only way to show if GM crops posed a risk to the environment or the human food chain.