PROLIFIC burglars, robbers and thieves in Avon and Somerset are to be among the first in the world to be tracked by satellite. The constabulary is among six forces taking part in the world-first scheme to fit GPS tags to thieves on their release from prison. It will serve as an extra source of intelligence to help police catch persistent offenders as figures show more than half of thieves and burglars re-offend within a year. Under new rules, burglars, robbers and thieves who have served a prison sentence of a year or more will be automatically fitted with a tag on release, allowing their whereabouts to be monitored by GPS satellites 24 hours a day for up to 12 months.