our TK flight from AYT was delayed and I was sweating ...

At IST domestic arrivals exit right and take lift 1 floor to departures.

BA Desk is about 1/3rd way along on the right. a Good 5-10 mins from the Domestic Luggage Belt.

Then the God Awful lounge is further along on the Left and up one floor and is always rammed! This is the generic lounge not the good TK one!

BA Flights usually depart further down and then turn right.

A long walk from check in desk.

hope this helps