Original: We will produce a Sheffield Plan that will apply to the whole city except for areas in the Peak District National Park.
Simplified: We will produce a Sheffield Plan that will apply to the whole city, except areas within the Peak District National Park.
Simplified: We will make a Sheffield Plan that will apply to the whole city except for areas in the Peak District National Park.
Simplified: We will produce a Sheffield Plan that will apply to everywhere except certain places in the Peak District National Park.