Flames ripped across a number of farmers’ fields across an area of 200 square metres.
A spokesman for South Yorkshire Fire and Rescue Service said: “Well done to firefighters from Thorne, Edlington, Doncaster and Adwick who tackled a blaze in Stainforth, Doncaster last night.
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“This was a fire involving several farmers fields, thought to be around 200 square metres in total.
“Unfortunately, we think it was started deliberately. Do you know who did it? Call our FireStoppers line, anonymously, on 0800 169 5558 and do you bit to stop this kind of incident happening again.
“On a happier note, it was great to see our new Polaris 4x4 all terrain vehicle in action. What a machine!”