A Mars bar a day is supposed to help you work, rest and play. But based on this brazen case of shrinkflation, one is unlikely to sustain you much past lunchtime these days. Cleaner Victoria Gordon was tidying a home when she uncovered a 35-year-old Mars bar – which looked gargantuan. In 1991, a Mars bar cost between 25p and 30p, now it will set you back £1.20 – for much less chocolate. A cleaner from Lincoln has discovered a 35-year-old Mars bar which looks gargantuan compared to its modern day equivalentVictoria Gordon, 44, discovered the chocolate bar while tidying a property.