From Karl Bowater:
Just been on with FSE and sat through a Presentation.
Free travel from both Istanbul airports to Taksim Square with Match Ticket
Free travel on Match Day with Match Ticket
The fan park in Gesi Park will have a stage. All controlled by the Villa.
Ground is 15 min walk from there. All down hill. Fans with Disabilities will get free shuttle bus
Villa fans enter into Blue section of the stadium.
UEFA tickets are Green or Purple so you need to follow them.
2 ticket checks before stadium. 2 security checks.
No coins. Powerbanks no larger than your phone. Then ticket scan into stadium.
Bags no larger than A4. Suggest not to take one!
Turkish Law is to carry ID but no passport checks at stadium
The club will be issuing a comprehensive travel guide in next couple of days and these will be emailed to ticket holders
Video showing the route from the square to the ground here also