"Sybil" is an 0-4-0 saddle tank

Sybil is an 0-4-0 saddle tank built in 1906 by W G Bagnall of Stafford, works no.1706. The loco worked at the Dinorwic slate quarries in North Wales for more than 50 years.
Here she waits to take out the next service down the line to Delph