Complex sentence: Traditionally, there are differences in the way it is eaten in each county: in Devon, the cream is traditionally spread first on the scone, with the jam dolloped on top; in Cornwall the jam is spread first with a dollop of cream.
Split into simpler sentences: Traditionally, there are differences in the way it is eaten in each county: in Devon, the cream is traditionally spread first on the scone, with the jam dolloped on top. In Cornwall the jam is spread first with a dollop of cream.