Originally Posted by
xnetco
Do you think BA would be likely to let them cancel, get a refund or give a voucher for this trip instead?.
No, they won't be able to cancel and get a voucher. They can cancel and lose everything if they prefer, I think that's the only option as the FCO has not changed its travel advice and still regards Turkey as a safe place to travel to for everywhere except the southern and eastern border regions.
https://www.gov.uk/foreign-travel-advice/turkey