I have had two of these since 2014. One was written off when a truck forced us into the central res in 2019. Its mileage was excellent as I drive to max the mileage; always in the low 60s. The newer one, a 2018 1.5, did not do as well but I could still get high 50s. Until recently. Suddenly - which of course it isn’t because we have been locked down and there has only recently been a (legal) weekly journey, I get the same mileage as my wife’s much bigger Toyota ie low 50s. I think this happened After a service in September (it didn’t really need it but I did it anyway) and short journeys to get the shopping hid it. Research on the net says that this issue (software updates reducing mileage)?was noted in 2018 on a Prius. Does anybody have any insight / experience of this? The garage over the road (non Toyota and v helpful) put it on the computer and found no anomalies. I have not yet approached the Toyota garage where the service was done.