A 14-year-old boy who suffered life-threatening chest injuries when he was thrown from a fairground ride at last weekend s Sonisphere festival in Knebworth has been transferred to St Mary s Hospital in London. The teenager fell from the ride on Saturday

A 14-year-old boy who suffered life-threatening chest injuries when he was thrown from a fairground ride at last weekend's Sonisphere festival in Knebworth has been transferred to St Mary's Hospital in London.

The teenager fell from the ride on Saturday afternoon and was being treated at Lister.