May be a bit late but Lidl did have some extinguishers last week and were still available yesterday at the Weymouth and Dorchester branches, so might be worth a look. I have three ,one for the workshop,one in the kitchen and the last for the car. For those that don't know me,I lOst thirteen cars when my business burnt to the ground,the fire being caused by the candle company next door. I HATE CANDLES !!!

Location: Piddle Valley

I think petrol evaporates so quickly from hot surfaces that it doesn't usually reach its flame point (280 degrees) but of course the resulting vapour is dangerous. I believe that oil and especially brake fluid are more likely to catch fire as they sit on the hot surface and hence reach flame point. Old type brake fluid especially dangerous.