Councils in the South West made more than forty million pounds from car parking charges in 2011 to 2012.
In some areas, like Weymouth, traders say the high parking charges discourage shoppers.
The bill faced by residents there is more than twice the national average.
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The heatwave will culminate next Wednesday, which forecasters say could be the hottest day of 2018.
The Prince of Wales and Duchess of Cornwall will be visiting the city in an attempt to encourage tourists to visit.
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