My most recent fuel up was a pathetic 34.4 MPG (36.9 Fibo) . A far cry from the 50 I managed last summer. Although I’m barely driving, and do only short journeys thanks to WFH, I felt something was wrong , I read somewhere on here that it could be a sticking brake pad. And sure enough that was the culprit. Turns out a rear caliper was stuck. £300 later I have a new caliper and all 4 new discs and pads . (The front ones were previously warped causing vibration hence got all 4 changed). I’m still doing limited driving, but the MPG has risen to 42MPG after about 60 miles. Hopefully will return to 50s in summer.