Apparently there is no risk of shortages of petrol, unless people panic buy (which is what caused the shortages 5 years ago). Diesel is more restricted in supply, which explains why unleaded has gone up 14p a litre since the war began, whilst diesel has risen in price by twice that amount.
The RAC are tonight saying that unleaded is likely to go up another 7p a litre by Easter and diesel by another 14p.