[sebazzz]

They are quite expensive and there is not something similar on the market (even not from house brands of Aldi, Lidl, etc).

[nly]

Cadbury have TimeOut but it's not quite the same. (It's lighter, less chocolate and less dense)

Clearly intended to be the direct competitor though, since "Have a break, have a KitKat" is the KitKat slogan, and timeout is also a break.

https://www.tesco.com/groceries/en-GB/products/316651552