Meanwhile, pump prices have dropped in Spain, cutting the cost of fuel by GBP0.09 per liter, making it a close runner-up to Switzerland and the cheapest of seven Eurozone motoring holiday destinations surveyed. At GBP0.78 per liter, unleaded petrol costs GBP0.24 less in Spain than in the Netherlands, the most expensive of the European destinations.

The Post Office survey also revealed that motoring tourists using environmentally-friendly LPG (liquid petroleum gas) can expect to cut their fuel costs dramatically – by two-thirds in the Netherlands, the most expensive country for unleaded petrol but the cheapest for LPG, at just GBP0.33 per liter.

Belgium displayed the same trend in the Post Office survey. While unleaded petrol costs GBP1 per liter, LPG costs just GBP0.36. According to the Post Office, this means that UK motorists using LPG can travel 1,000 miles for over GBP100 less than unleaded petrol.

Overall, LPG fuel is cheaper by over 50% in eight of the 11 countries surveyed (Spain was discounted as it is not widely available) and only in Denmark is LPG more expensive than petrol, the Post Office said.

The UK hovers around the middle of both the unleaded petrol and LPG tables. However, while the price per liter for unleaded petrol has been threatening to hit the GBP1 mark in the UK for some time, it has already done so in four of the countries surveyed, namely Denmark, Norway, Belgium and the Netherlands, the Post Office said.

Commenting on the findings of the survey, Kevin McAdam, Post Office head of travel services, advised those planning to take motoring holidays in Europe to plan their itineraries carefully in advance, so as to take advantage of those destinations offering the cheapest fuels.