The branch near me have a dedicated P.C. set up so that anyone who doesn't have internet access at home can use that one.
They are also asking customers to sign a form to confirm that they have been advised to purchase the visa online as it will not be available in Turkey.
Didn't plan our holidays very well did I, we will have to purchase a visa in June, then another in September as it will be over the 90 day period when we fly home.
