But surely it's still clicking up earlier than it was previously?
For example, if it was clicking up at 200 yard previously and the yardage has been reduced by 12 yards then it'll be clicking up at 188 yards under the new tariff.
So if you now travel 150 yards (say) after the last click then there'll be no difference on the meter, but if you travel 195 yards then you'll get an extra 20p for the same job
So clearly most jobs won't show a difference, but a small proportion do.
And as you go further you're more likely to get the click up.
For example, five clicks on the old tariff would require travelling 1,000 yards, but only 940 yards (5 x 188) under the new tariff.
So trips covering 1,000 yards previously to click up a pound would only need to go 940 yards to click up a pound.
Of course, anything between the four clicks previously (ie 800 yards) and the new five clicks (940 yards) would still be on the four clicks, so you'd still only get the 80p.
So basically on the old tarrif, between 800 yards and 1,000 yards you'd get 80p, but on the new tariff that window would be between 752 yards and 940 yards. Of course, most trips would still end in the overlap between the new and old window (ie 800 to 940 yards) so would just show the same on the meter.
Of course, once you've done a certain amount of clicks then the overlap disappears and thus ALL trips will of that length will be clicking up earlier.
At least I think that's how it works
But in simple terms, if the yardage is decreased then the further you go the more likely it is to click up earlier.
On shorter trips it won't click up earlier very often, but the further you go the more likely it is to click up.
Put it another way, if you get a 10p per mile increase then you don't have to travel the mile to get an increase, even if your meter clicks up in 10p increments, because sometimes it will click over earlier and sometimes it won't.
So roughly speaking, if you travel half a mile then half the time you'll get the 10p, whereas the rest of the time you'll get nothing extra.
So your
average increase for the half mile or so is 5p, which equates to 10p per mile.