Peter describes cleaning the boiler front of locomotives on which steam had recently been raised to remove soot from the controls and gauges - known as 'front rubbing'. This B1 locomotive has recently had its fire lit at Grantham shed and you can see that smoke is filling the cab. Only a little is making its way through the boiler and drifting from the chimney. 31st August 1961.
Photograph by Cedric A. Clayson.