Out of date yoghurt, okay to eat ?????

I brought loads of muller light yoghurts last year n left them in my fridge ever since cuz i had other food to eat & nw i dont hav any food accept them but the pots say best before 22 november but it doesnt say 2010 or 2011 and they smell fine like yoghurt there not green or changed colour theres no mold whatso ever, do u think there okay to eat or will i get sick ? Thankyouuu