Following a slump in wholesale prices, oil dealers have been asked to charge drivers 5p less per litre of petrol within the next 15 days. Wholesale prices for petrol have dipped nearly 7% from last week, now resting at $1,133 (£705) per ton, and fuel firms should take note of the reduced price and bill accordingly, Automobile Association spokesman Luke Bosdet said. Supporting the price cut, Bosdet said it is…