I was inspecting my van's tyres the other day and I noticed they weren't really looking their best, so I did that test with a 20 pence piece to check if the treads were deep enough.
Lo and behold, they were in danger of becoming too shallow and so I immediately set off to buy myself some new ones.
I really wish I'd waited though, because companies have now started labelling tyres so that buyers know how efficient they are, how noisy they are on the road, and how safe they are in wet weather.
I went for a well-known brand that I've used a few times throughout my driving career, without incident, but I'd really have liked to be able to see how they compare with other makes and models.
For all I know, some lesser-known brand which costs less than the one I bought, is more efficient and would have meant that I could save more money on fuel.
It all depends what you're looking for in a tyre, really. If all you care about is the price then the new tyre labels won't be much of an interest to you, but in my opinion they really should be.
Sometimes ignorance is bliss, but I'd rather be given all the information so I can make the right decision for me, my van, and my business.