Follow the Money: why is diesel so expensive?

The war in the Middle East has pushed up crude oil prices this year and that’s had a knock-on effect on the price of refined oil products like diesel.

But having adapted to the conflict, the Gulf’s oil producing nations are now managing to get most of their exports out, so why hasn’t the price of diesel come down?

We trace the journey of a barrel of oil from the Middle East to the petrol pump, looking at the rising costs along the way.