Debate in progress
http://www.bbc.co.uk/news/uk-politics-15730087MPs are debating a motion urging the government to stem fuel price rises amid a public outcry over costs.
Tory MP Robert Halfon's motion was tabled in response to an e-petition signed by more than 110,000 people and is supported by more than 100 MPs.
The government plans to increase fuel duty by 3p a litre in January - meaning an extra £1.50 to fill an average car.
It says prices would be even higher had ministers not scrapped automatic fuel-tax increases imposed by Labour.
Petrol prices have tripled in the past two decades.
Chancellor George Osborne scrapped the annual fuel tax escalator - a mechanism under which duty rose by 1p above inflation every year - and cut fuel duty by 1p in March's Budget.
However, he has only postponed the planned inflation-linked part of the duty rise from April 2011 to January 2012, and from April 2012 to August 2012.
Mr Halfon said high fuel prices were causing "immense difficulties" for small and medium-sized businesses, and that some low-paid workers were paying a tenth of their income just to fill up the car.
In his motion, he urges ministers to consider whether current fuel tax rates are economically competitive; what impact they are having on economic growth and unemployment levels; and to examine the case for a price stabilisation mechanism to even out fluctuations in pump prices.
The Treasury has already said it will introduce a "fair fuel stabiliser" to ensure price rises are capped to inflation when oil prices are high
Labour have welcomed the chance for a debate on the issue, but said there must be "concrete action" to help business and families rather than "warm words".
The party's leadership had backed an amendment by backbench MP Dave Watts urging the government to reverse January's rise in VAT to 20% - which they say would cut 3p off the price of a litre of petrol.
"With our economic recovery choked off well before the recent eurozone crisis, we need action," said shadow Treasury minister Owen Smith.
"A temporary VAT cut now, part of Labour's five-point plan for jobs, would not only help motorists but would help all families and businesses and give our flat-lining economy the boost it desperately needs."
The AA said the latest fuel price rises were already impacting on drivers, and that for the average motorist the planned increase would equate to an additional £38 a year at the pumps.
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Motorist: "Petrol prices are appalling at the moment"
AA president Edmund King told BBC Radio 5Live that the AA's latest survey showed that some 70% of motorists were already cutting back on journeys or other expenditure.
He said price increases were "socially divisive", saying the nation was being divided into "drives" - people who can afford to drive - and "drive nots".
Mr King said for many people on lower incomes motoring was a necessity, particularly if they lived in rural areas and needed their car to get to work.
"They need to drive, they cut back on other things - even things like household expenditure, the weekly shopping."
'Strangling the economy'
Motoring journalist Quentin Willson, who speaks for FairFuel UK, a pressure group behind the e-petition, said he and others "want the whole fuel pricing issue to become open and transparent", adding that high fuel duty is "strangling the economy".
"There are desperate, desperate people who cannot afford to use the roads. The effect on society at the moment has been absolutely desperate. Fuel duty is strangling us," he said.
Meanwhile, Richard Hebditch, of Campaign for Better Transport, said the "big problem" is that Britons are reliant on their cars and dependant on foreign oil supplies, which are "quite risky oil supplies".
He said: "What we need to do is take the money from fuel duty and invest it in giving people real alternatives and modernising our transport systems so we aren't so dependant on foreign and risking oil supplies."
Tuesday's debate, expected to last three hours, was approved by the Backbench Business Committee.
Looks like some MPs are revolting ( but then we all knew that

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