We are visiting friends in the Midlands. We will be staying 4 nights near Chesterfield. We have a sample itinerary, but would like suggestions to help us maximise our time. Here goes;
day 1 hardwick hall,
day 2 celebration,
day 3 chatsworth
Day 4 Warwick castle
Day 5 Stratford upon Avon
Day 6 Stonehenge
Day 7 Leeds castle
Day 8 Windsor castle/london
Day 9 fly home at mid day.
All suggestions are gratefully received. What should we see, what should we avoid?
Apologies for lack of capitals, I am on a small phone with fat fingers 
Thank you