Hi everybody, I appreciate all the feedback. Really, what I am being told is that I need a lot more time to explore the beautiful areas that I have outlined. I will be only touching the surface. I can't make any assumptions about what life will throw at me in the future, so this may be my only trip to England I need to weigh up, seeing enough, and not trying to do too much.
I have updated my itinerary for about the 10th time to the following after all of the kind advice:
Four nights in London - Train to York
2 Nights York - Train to Edinburgh
3 Nights Edinburgh - Pick up Hire car
2 Nights in the Lakes District
3 Nights Based in the Cotswolds—Say Bourton on the Water with a planned day trip to Oxford or Bath.
1 Night, Windsor or Salisbury
Heathrow for 8 pm flight
I hope this is not too hard, but it will show me enough to ensure my next trip focuses more on a few specific areas if I am lucky enough to return.
Thank you again for all the feedback.