While the contractors are on the site there is only a temporary fence, and it is not too difficult for a large enough number of determined people to breach it. But as soon as the contractors have finished, a proper, high security fence will be erected round the site. Meanwhile, we do the best we can, with both the civil and Royal Air Force police, to stop these incidents. I am expecting a full report in detail of what happened and I shall then certainly consider what steps we can take to prevent further occurrences of this nature.