I'd be interested to see how that trip looked from the point of view of where you were going from and to with the required stops along the way.
It was very much a journey of two halves
I started going from East Kent to Brighton. This was an absoltue worst case scenario. I had to do some drop offs first and I miscalculated my charge / didn't have time to get the car to 100% at home. I was driving against a hurricane, in the rain, while it's cold at night. Sometimes it's actually quicker to take 4 15 minutes stops and drive at motorway speed, than to make two 45 minute stops. The amount of extra charge you get after half an hour is minimal.
So, on my journey out I stopped 4 times at Folkestone, Maidstone, Clackets and then Pease Pottage. The first three I stopped for about 15 minutes to top up from ~30% to 70%. Enough time to go to the loo / get a coffee. Pease Pottage I stayed for about 50 minutes because the charger was on free vend - so I filled it to about 87%. I had my evening meal there. Got to my hotel in Brighton. Next day there was a bit of driving around in Brighton, then I headed up to Guildford. I stopped at Pease Pottage again for about 30 minutes - mainly because I knew it was on free vend. Then drove to Guildford where I wanted to try out one of the new Shell quick chargers - which worked great (using just a contactless card).
Driving around a bit in Guildford the next day - then headed home. On the drive home, I managed the journey with just two stops - Once at Clackets and Folkestone.
Next day was to Ashford. I only charged to 80% at home, then stopped for breakfast at Folkestone on the way and charged back up to 80% while I was there. Then drove to Ashford, and managed to get home again without having to charge again.
The way I normally drive is to have my phone satnav on an optimistic charge destination, and the cars satnav on a safe charge location. That way as I'm going I can determine whether I can make the further stop without running the car down to very low percentages - which I try to avoid to look after the battery.
All the chargers (bar the Shell one) I used were Ecotricity motorway fast chargers and they were all working fine. Nobody was queuing for the chargers.