Dear
DaveS . Thanks for sharing this part of your journey.
Unfortunately, DAR is not considered as long-haul but medium-haul so it's pretty normal that you got the boxes and the bag with the cheese sandwich.
Also, I hope that you enjoy your journey with the A350 tomorrow. Both TC-LGA and TC-LGB is at IST at the moment. One would head to Manila tonight as TK84 and the other one would operate your flight. Also as the aircraft is at a remote stand, your gate would be one of gates A1 or A4.
I hope you enjoy the A350 and waiting for the trip report for the LHR leg. Don't be surprised if you get the cheese sandwich for that flight as well
By the way, as usual, I'm also transferring the image photos to the catering database in the respective thread.