One of the largest prehistoric hill forts in Britain has been found on the edge of the North York Moors.
The ditches and banks of the structure cover 16ha near Thirsk. The fort was enclosed by a 2m deep trench and 4m feet high rampart that stretched for 2km.
Investment generated by a 35% increase in water bills since privatisation has led to Britain's rivers being in their best state since the industrial revolution, according to environment minister Michael Meacher. Ninety four per cent of rivers are classified as of good or fair quality, compared with 85% in 1990.