Motorway services rip us off 365 days a year - but I always find myself feeling most aggrieved by the scale of their rapacity in the festive season.
It was brought home to me last week by a stop at Chieveley Services on the M4. The logistics of doing a job meant that we had to leave one car here and pick up another, pop to Wales for a video shoot and then do the whole car-swapping process in reverse.
So guess how much Moto charges to leave a car for seven hours in a carpark in rural Berkshire? £5? £8?
No, try £25. Which, to apply some perspective, is slightly more than it costs to spend a day in long-term parking at Heathrow Airport.
My immediate reaction consisted of two words, the first was 'thieving' and the second was unprintable. But with two cars and only one of me, I had no choice but to pay up.
The thing is, it doesn't need to be this unpleasant. Existing motorway services are operated by private companies - but the service areas themselves are mostly owned by the Government and then leased out.