In the end I had to get fuel in Dieppe. I was driving faster and harder with more weight in the car on the way here. Lost quite a bit of range....
Pricing was interesting. From €1.2 in the Auchan hypermarket to €1.093 in the Esso Express. I saved €4 in filling up my car, simply by looking around, instead of dropping into my usual station at Auchan.
Fuel here in the Wolds of Lincolnshire is circa £1.70 and I paid about £1.72, so not a big issue.
Car is now full again and will stay that way.