Visas: Visas are required for many visitors, when obtaining visas at the border or airport, seek out the separate visa sales desk before getting in the line for passport control. UK passport holders need a visa, obtainable in advance at a Turkish consulate, or at the border with no trouble, for 10 UK pound note (British, not Scottish) to pay for visa.
Tourists from the UK can buy a visa easily at their airport of arrival. The queue to buy this will be found just before passport control. The visa is valid for three months and payable for in GBP. Each traveller needs a visa so remember to keep a £10 in each passport.
For the exact costs and requirements for different nationalites look up the Turkish Ministry of Foreign Affairs web site and follow the pages along to find out all necessary requirements for visa enties into Turkey. The cost of the Visa is also dependant on the nationality of the passport holder and these cost will vary from country to country.
Most if not all visas can be purchased upon entry ( gate ) into Turkey but there are some countries with passport holders that do need to apply direct to a Turkish consulate for visas.
Current Visa Information from the Turkish Ministry of Foreign Affairs