Why are petrol and diesel prices increasing?
Retailers are pushing prices higher on the back of rising oil and wholesale costs.
The wholesale price of petrol rose by 6p last month due to the higher cost of a barrel of oil, which jumped by $10 in July.
Oil rose from around $74 a barrel at the start of the month to $85.56 by 31 July - and remains around the same level today.
This is the highest oil price posted since the middle of April.
For British drivers the situation is exacerbated by the pound having fallen against the US dollar since mid-July, declining from a recent peak of $1.31 to $1.27.
This is causing 'wholesale prices to rise significantly', according to the RAC's fuel price expert, Simon Williams, who added that retailers are 'wasting no time in passing this on to drivers' as they lumped an extra 2p-a-litre on the price of petrol by the end of last month.