In November, I bought a tankful of heating oil at 44p-a-litre. Today a refill would cost 68p-a-litre.
So far as I can see, the wholesale price of oil has hardly changed over that period.
I am having a similar experience with bottled gas. It has increased over two weeks from under £50-a-bottle to nearly £80.
No doubt the suppliers would justify these increases by pleading increased costs due to the bad weather, but I suspect that they are simply using the bad weather to squeeze as much as they can out of their smaller customers.
I bet the big customers are not paying these increased prices.