Hi all, i've just been on the fco.gov.uk website and have copied the information below. I flew out at the end of April and have one of the new stickers 90/180 so have just checked. Hope this tells people what they need to know.
ENTRY REQUIREMENTS
Entry Requirements - Visas
A visa is required for British nationals to enter Turkey unless they are cruise ship passengers who enter the country for a day trip and return to the ship the same day. British citizens (for diplomatic/official passports see below) may obtain a multiple entry visitor's visa valid for 90 days at the port of entry on payment of £10 in cash (Scottish currency is not accepted).
Turkish Authorities recently revised their visa stamps. All visas now state that they are valid for multiple stays up to a maximum of 90 days in a 180 day period. However, the Immigration Authorities inform us that these rules are not being applied and that visas are valid as before, for multiple entries within 90 days of issue. Be careful not to overstay 90 days from the date of issue, as some British nationals have been fined and banned from re-entering.
British diplomatic/official passport holders must apply for a visa before travelling. If you do not have a visa issued by a Turkish mission overseas, you may be refused entry, detained and deported. If travelling on unofficial business, you should use your normal passport and buy a 90 day visa at the airport on arrival.
If entering Turkey via the Bulgarian border crossing, ensure that your passport has a dated entry stamp. Some British nationals have obtained a visa but not had their passport stamped. In some cases, this has resulted in detention and later deportation for illegal entry.
If you hold aBN(O), British Overseas Citizen, British Protected Person or British Subject passport you should check visa requirements with your nearest Turkish Consulate before travelling. If you arrive without the correct visa, you - may be refused entry to Turkey.
Working illegally, without the correct visa and work permit, could results in deportation from Turkey, a fine and a ban on re-entering. You may be held in detention awaiting deportation and are unlikely to be able to collect your belongings before departure.
