I was lucky to get 36 overall from my 15 reg Advance, quite disappointed (in the mpg), really, as I’d previously had a couple of diesels, and expected the hybrid to not be far off, but it was a good 10mpg down, on similar, conservative driving. OK, I only did 10k miles in it from new.....
BUT - at the end of the lease, I was told it would be collected on a date a couple of weeks ahead, so I visited a petrol station. A couple of days later, the lease people phoned to say they’d brought the date forward.....
At that point, no longer bothered about mpg, I discovered Sport mode, and realised what a quick car it could be, but no 36 mpg, of course!
Having said all that, though, I thoroughly enjoyed it, but it had to go back when I retired.