Title:
M1 Motorway, Structure 9 Luton-Dunstable Railway Bridge, Caddington, Central Bedfordshire,17/05 Creator: John Laing plc.
Caption:
A Laing labourer laying bricks near a drainage channel during the construction of Structure 9, a bridge carrying the Luton-Dunstable railway line over the London to Yorkshire Motorway (the M1). The caption beneath the corresponding album print states that this is 'blue brickwork'.