I wouldn't worry it's normal to get lower mpg around town, I drive to work a couple miles away so mine is always low, around 28mpg!im worried that im only getting 30mpg in my 1.2 16v, mostly used for round town
god knows on mpg as my display has decided to stop showing it, cba to work it out but the other week i got 280ish miles to half a tank, most of it motorway at a minimum of 75mph