The most likely event was the April/May 1955 Markham Main wildcat strike that spread out throughout the Doncaster pits and beyond.
The dispute was centred around demands for revision to piece work rates which hadn't been substantively revised in over two decades for fillers at Markham Main (or for that matter in other NCB pits). Fillers struck on 21st April and the rest of the men came out in support. The Doncaster Miners Panel gave a weeks notice to the NCB, that men in surrounding Docaster pits including Bentley and Brodsworth would came out in symphathy closing all 13 pits in Doncaster. Ultimately the Doncaster Miners Panel and particularly activists from Armthorpe brought out over South Yorkshire pits by sending delegates to address colliers and ask for their support (effetively one of the first use of 'flying pickets') The dispute spread out to effect 56 collieries and involved 85,000 men.
The strike was vigoursly opposed by not only the NCB but also by the NUM at both national and Yorkshire level. The Doncaster Miners Panel defied the direct instruction of the Yorkshire NUM and ultimately the NCB backed down on the 16th May and conceded to the demands of the Markham Fillers. This resulted in improvements to 291 of the 301 pricelists in operation at that time in the Yorkshire Coalfield.