The bars are available with an RRP of £1 and each pack includes five individually wrapped bars. 

Each bar contains 97 calories, in line with Public Health England’s new 100-calorie snacking guidelines.

David Carey, senior brand manager for McVitie’s Cake at Pladis, said: “The McVitie’s Jaffa Cake Bars range has become one of the fastest-growing products in the category over the past few years, helping to make McVitie’s the number-one brand in the category.”