Many peoole like to eat these fluffy and tasty Britannia's fruity cake but the dark side of these products was recently discovered that they are made using a chemical put into it called potassium bromide which is a carcinogenic chemical in humans recently investigations revealed about this fact. Infact use of this chemical is banned in many of the countries around the world as it is known to produce carcinogenic features in humans.
So it would be advisable to avoid consuming these breads, cakes and such other bakery's products as much as possible.