I failed the emissions test when i went for an MOT and the shop told me it might be the converters. I didn't believe them at first, it's only a 6 year old car after all, but turns out they were right... When i removed them you could even visually see that the cells inside were destroyed...
My consumption is the same mate, i do mostly stop/start, 1st-2nd gear driving during the week, can't be helped....