Here's an even younger one, David Johnson
'a member of Chevington Church Choir, who was accidentally Killed at Broomhill Colliery, Sept 29 1911, aged 14 years.'
He was ran over by a 'Set' [according to the Durham Mining Museum web site]; a 'Set' being a connected train of mine tubs.
This stone is in St. Johns Churchyard Chevington.
sorry about the photo, undergrowth and shadows from the trees!