Sarah contacted me at last minute (Sunday morning at 9 am, the very day I was travelling to Edinburgh) and informed me that she would not be able to let me in the flat because of a "slight problem" (it turned out to be a problem with the electric system). She offered to rent me another property, located 3 miles away - I had chosen her flat because it was next to my son's place and was not going to commute twice a day by cab or bus (or Uber paid by her as she offered) to see him. Therefore I had to decline this offer.
While I appreciate that Paula put my safety on top of any other consideration by cancelling our initial agreement, the very short notice - a few hours before my flight - was not very convenient for me and I would have also appreciated to be contacted a bit earlier.