Roly at this time of year from near Stafford to our daughters in Edgbaston Birmingham it 36 miles, about 50% of that is motorway, I set the speed limiter @55mph and can only just do it on electric 36 miles, fortunately the daughter lets us plug in with the granny lead.
I found if I set the speed limiter to 60 mph the range drops to 33-34 miles. Nice to know you are achieving very similar figures. We are with Octopus Go and get the 5 pence a kWh night rate.
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.