If the whole country was organised into something they agree with, then it'd be good.
Even then it wouldnt do much, Transaction was a country-wide action group cosisting of hauliers, farmers, van owners and the odd car owner like myself (remember the motorways all over the country being bought to a halt/rolling roadblock by lorries a few years ago and fuel shortages, that was Transaction).
The most it ever achieved was a 6 month delay/postponement on a 2p duty increase iirc, and that was in the good old days, when the country had money to play with.
The owners original intention was to try and get a few pence discount for businesses reliant on transport, and once it became clear, after a few years, that the government were never going to give in, the group disbanded unfortunately.
If the government wont even offer a discount to the businesses that keep this country afloat, they are never going to lower the price all-round for everyone.
The only hope we have, is the tories planned price stabiliser, but thanks to fiancial meltdown left by the last Labour government, there is little chance or even option for them to implement this now, especially given the current silly price of oil.