Well second tankful was 29mpg - that was Sainsbury's petrol - now filled up with Esso - wonder if that'll make a difference.
I never realised that different petrols could make such a difference - I thought 95 RON was 95 RON regardless of where you bought it
Well it's just something that I I've found over the years, perhaps other people have found different, but I work my fuel economy out every time I fill any of my cars and that is pretty much the story for me.
Anyway, here's hoping that you crack the 30 mpg barrier!