They all could have had Covid tests to be able to get on the plane, in which case there is no need for her and her friend to SD.
My FB is full of people in Turkey, in packed bars, most of them will be coming back and going to work in Care Homes and across Social Care, Carrie's holiday will be much cleaner than Marmaris and she will be taking all necessary precautions to protect them all and more than likely limiting social contacts when she gets back.
I hate the Tory party, but she is entitled to be on holiday.