There's a lovely piece of maths to be done involving the increasing number of EVs on the road, the increasing range, and the location/numbers of rapid chargers.
When the 30kwh Leaf appeared, that allowed for considerably longer journeys between chargers. With the 24kwh Leaf, the chargers really need to be about 50 miles apart as a bare minimum, on the basis that you don't want to be charging too early, nor too often. Anything under 70 miles and I don't need a rapid charge. More than that, and I almost certainly will.
At the moment, I tend to "leapfrog" chargers. For a typical full day (250 miles by my definition - the battery temperature will be getting pretty high by that time, and my appetite for driving will be sated) I will leave Southend with 100% and then charge around the 70 mile mark, and then each subsequent 50 miles. I should be able to get to Burnley (sis-in-law) or S. Wales (Brecon Beacons holiday) on 3 rapid charges.
With the 30kwh battery, my experience, limited to 1 weekend's test driving, would indicate that leaving home with 100% would allow a full 100 miles before charging, then 80 miles for each subsequent charge. I ought to be able to do the 250 mile trip on just 2 charges, and presumably a rather cooler battery.
Now here's a big assumption: that London will be the starting point of a relatively high percentage of long trips. Assuming that the 30kwh Leaf is going to be around for a while (big assumption number 2), does that mean that there should be a big bank of chargers on each motorway about 100 miles from London?