SUV PHEV’s typically achieve 2-3 Miles/kWh assuming 24p standard tariff your looking at 10p/mile
If using an EV tariff such as Octopus Go where offpeak is 8.5p, then cost is 3.5p/mile
If using in a hybrid mode, it is highly dependent on the driving you are are doing. typically PHEV’s tend to start engines around 35MPH
Assuming driving is mostly above that 35MPH, MPG can typically be around 40-45. Interestingly, I experience minimal battery drain doing these sort of stretch’s, so ill ignore that cost.
assuming petrol @ 145p/litre and 45 MPG, expect around 14p/mile
As you can see, unless you are using an EV tariff, there is very little point to a PHEV in my experience.