Very good, keeping below 60mph would definitely be helping your efficiency,
I try to keep speed down a bit when I can but unfortunately as a lot of my commute is at rush hour on a two lane motorway that's not realistic as I'd be a nuisance to others, also in Ireland m-way limit is 120kmh/75mph so that makes its slightly worse
I've come to realise that even though most EVs (and ICE cars) lose more efficiency at higher speeds, the MG4 seems worse than most, and the Trophy model with spoiler worst of all, a shame as otherwise a great car.
My average is 19.2kwh/100kWh (3.2m/kwh)
So as I say above its likely motorway driving is what's killing my efficiency, my range works out around 320km or slightly less, so prob 25% down from the stated range.
Currently not a big deal for me, but I'm hoping range doesn't fall off a cliff when the colder months arrive ?
Although from figures others quote the SR (LFP battery chemistry) seems to suffer more in colder months than the LR (NMC battery)