Here is my tentative itinerary for a 2 week trip to London. With 3 days in Paris, I still have an extra day to fill. Any comments welcome.
Day 1
- Flight into London
- Find hotel , learn bus/tube system, spend rest of day meandering
Day 2.
- Bike tour 
- Medieval banquet 
Day 3.
Hop on/off Red River Rover Cruise  
Day 4 
Private Viewing of Stonehenge including Bath and Lacock  
Day 5
Hop on/off in London
Day 6 
ROYAL WINDSOR AND HAMPTON COURT PALACE
Day 7
Leeds Castle, Canterbury, Dover, Greenwich and River Cruise from London   
Day 8
Museum Tours through the Origional London tours 
Day 9
Day 10 
3 days in Paris ?
Day 11
Day 12
Day 13
Flight home