Seeking Itinerary Advice

Hi everyone,

I arrive in UK tomorrow and would love some help finalising my schedule:

16th December: Arrive in Heathrow - explore London - grab Bus to Penzance explore Penzance, stay overnight in Newquay (hotel not yet booked)

17th December: Take train to Edinburgh, explore Edinburgh - hike to Loch Ness and end up in Inverness ( hotel not yet booked)

18th December: Wander to York - explore York, hop on a tram to Cotswolds and look at all the cute villages - then back to Heathrow for lunchtime flight. (Not yet booked).

Thoughts?