MyLondon that she had been eating the meal for a good 20 minutes before making the gross discovery which made its way into the bucket from a branch in Harrow Wealdstone.
Rebecca said: "One of the pieces I bit into didn't taste right then I started picking at it and discovered a brain-like piece in the chicken and straight away I panicked and was in pure disgust."She added: "My initial thought was don't throw the piece away.
Everyone stopped eating and went looking for the receipt." Rebecca, who lives in Harrow and was enjoying the meal with her three-year-old son, said she called customer support to report the issue and also warned other locals online about the "quality of chicken" at the Harrow Wealdstone branch.
Read more on dailystar.co.uk