Schools in the UK has been given the green light to fingerprint children as young as five, without having to get permission from a parent. In addition to fingerprinting, Iris scan, vocal recordings and face shaping can be collected and stored.

I would expect this sort if thing as a result of the Patriot Act in the USofA, not in England. LibDem MP Greg Mulholland said:

"It is highly disappointing and unsatisfactory that there remains no legal requirement for parental consent before a child's biometric data is collected. This is unacceptable. A school would never dream of taking children on a school trip without consent, but collecting their fingerprints is not subject to the same safeguards."

Source.