For lower medium vehicles such as Astra and Escort, weekly rates varied from £176 to £117 while daily rental rates varied from £26.40 to £43.50. The largest drop at an outlet from one month to the next was 23% and the biggest rise was 30%. For upper medium vehicles such as Mondeo and Vectra, the highest rate was £343 - £158 a week more than the cheapest. Daily rates went from £33.99 to a high of £52, and the biggest month-on-month drop at one outlet was 29% and the biggest rise 34%.
Robyn Keetley, of Practical Car and Van Rental, says: 'There is a regular and quite large fluctuation in prices, which can be brought on by rental firms responding to local conditions and demand for their vehicles. This shows a need for fleet managers to be very wary and shop around.'