The NER worked its Claytons just they would a J27, this could well be a Bolden Colliery to Tyne Dock workingChris Purdon says Yes, that's Boldon Colliery. The signal box in the background is at Pontop Crossing, very roughly half of a mile east of Boldon Colliery station. The Clayton is on the Sunderland to Newcastle line, heading west towards Boldon Colliery station. More information, photographs and maps of this area can be found at http://www.washingtonimaging.co.uk/railway/boldon/Boldon_Steam.html