The WLTP range for the MG Excite 51 is 350km not 405km. The WLTP range for my MG Essence 64 is 435km with the lower spec Excite 64 it is 450km. None of the models has a quoted 405km range. This is the old out dated NEDC range which was very inaccurate & was created in laboratory tests in the 1980s based on urban driving. It was last updated in 1997.
A friend of mine has an Excite 51 & gets over 300km. In mine the range is about 380 to 400km based on 110km highway driving & some 50 - 80 km driving. Driving around in an urban environment at 50 - 60 kmh gives me much higher range. The range estimator (also known as the guess-O-meter) has given me 505km from a full charge & that would have been close if I hadn't gone over 50kmh. It has a level of intelligence that works out the range based on your driving style & it is surprisingly accurate.
It is 182km from my house to Gold Coast Airport & a few weeks ago I left with 100% charge & arrived with 52%. Most of this was at 110kmh on the Pacific Highway. I could have got home without getting a charge but just like with my old petrol car I would never let the fuel get that low. I spent 15 minutes at the BP in Ballina for a comfort stop & coffee & added some charge. Cost me $9.04 but there was plenty left when I got home. Other than long trips it costs nothing to run my EV as I charge from solar, supplemented by my home battery and 3 hours of free power every day. I'll never have to worry about the price of petrol going up because of wars or other reasons for shortage.
In any vehicle, electric or internal combustion it all depends on how you drive, the terrain, weather, the total weight of the vehicle and use of accessories like air conditioning etc.