I think it's just the short journeys that knacker the mpg. I'm doing regular 5-7 mile trips with lots of stops but on the rare occasion I hit the motorway for a good spell the consumption shoots up to over 50mpg.
The weather has warmed a little too and my average has risen from 37mpg over the winter to around 40mpg at the moment.
Last fill driving easier than usual, 50.1 mpg, Usually I get 47 or so.
2013 Type S Tourer 2.2
Change all filters regularly especially the airfilter, that really gets blocked quickly because the area is so small.