I just read that article and wondered 2 things
1. are these people sensible
or
2. are they stupid
If they stay in Turkey for 10-11 days then legally what they are doing is fine. An extra holiday for much less than the Boris Hotel scheme but......
Once they do arrive back in the UK are they doing the quarantine at home like they are meant to? I doubt it - Boris & Co need to do physical checks on 100% of people coming back to make sure they are where they state they will be staying rather than the phone call they do for most of the 10% they currently check.
If they just do a couple off days and then lie about where they have been, I hope the feccers get a good hiding with the rubber hoses in the detention cells when immigration see the stamps in their passports proving they were lying.