Not my side of the pond, but clicking around on Gridserve I'm only seeing a maximum charge rate of 60kW. I haven't found a Circle K above 50kW. Ionity has chargers that go to 350kW.
For comparison, Tesla superchargers are 150kW or 250kW.
That metric shouldn't be interpreted linearly. You only really saturate a charger for the first few minutes of a charge when fairly depleted. Above 15% to 40% of your battery capacity the charging rate slows down (depending on what sort of battery you have).
As an example, a 2022 Lucid Air Dream Edition can use 350kW chargers. Going 20% to 80% on a 350kW is 31 minutes, and on a 150kW is 32 minutes. That's negligible. If you start lower than 20% then there is a bigger difference, but I picked 20-80 because it might match a person that exclusively uses non-home chargers. Data from chart in: https://insideevs.com/news/567714/lucid-air-fast-charging-co... (Also, I suspect a real 20-80 test might show a bigger difference. The 0-20 part of that charge probably heated the battery up more on the 350kW.)
Use cases matter a lot. The only time I use a supercharger is when I'm driving more than the range of my car in one trip, 900km is typical of a driving day for me. I'll stop 3 or 4 times at super chargers. Other than that I just charge off the regular old wall outlet in my garage.
But if you live in a place without garages you will use chargers a lot and care about where they are located. I have to say a lot of the US superchargers are in odd places, like no bathroom available at night. Most of the rest are in the far corner of some enormous parking lot of an enormous grocery store. By the time you hike to the store, find a bathroom, buy a snack, and hike back to the car you are mostly done charging.
Which brings me back to the parent post… "Location!" I absolutely prefer a Circle K with a supercharger. Short walk, open 24 hours, grab a snack, and back to the car with time to check email and maybe HN before heading back to the road.