I’m in the process of doing so, Brydo. In ‘pure’ mode, driving locally (so under 30mph) I’ve managed 28 miles on one single journey, 26 on a day of multiple journeys. In Hybrid mode, 22 to 24. Hybrid mode driving faster , so mostly 30 but stretches at 50 seems to get not less than 20.
Having done 1000 miles now, the average has been 62.7 mpg, about half that distance on long journeys.
Worst long run with a depleted battery has been 46 mpg.
Best long run (95 miles) starting with a full battery, 58 mpg.