Here’s a bit of number-crunching for you. The credit card statements are all in now so I know how much (in sterling) I spent on diesel during the trip:
Overall, then, I drove 2890 miles from Blyth to Blyth and burned 252.99 litres of diesel at a total cost of £290.31. Thus the fuel economy for the entire trip was 51.93mpg. I’m happy with that!
It’s also worth pointing out that the average cost of a litre of diesel in France was £1.12. This was from a mixture of motorway services (dearest at £1.23), a wayside filling station and supermarkets (cheapest at £1.05). Compare that with the final ASDA fill-up at £1.33. As I said elsewhere – welcome to rip-off Britain where even the tax on fuel is taxed.