The Turkish Embassy, London
http://www.turkisheconomy.org.uk/index.html
The Turkish Consulate, London
http://www.turkishconsulate.org.uk/
The British Embassy in Turkey, Ankara
http://ukinturkey.fco.gov.uk/en/
Turkish British Chamber of Commerce and Industry
http://www.tbcci.org/
Ministry Of Culture and Tourism (in English) with virtual tours of many of Turkey's most famous tourism venues http://www.kultur.gov.tr/EN/ana-sayfa/2-0/20110702.html
Property related
The consumer guide - "How to Buy Overseas Property Safely"
http://www.aipp.org.uk/consumer/buying-guide-and-advice/
2010 Rental Income Tax Guidance for foreigners.
www.gib.gov.tr/fileadmin/beyannamerehberi/rental_income.pdf
Property Tax International. Experts in Tax issues in 15 different countries - including the UK, Turkey, Brazil, Spain and the USA. Comprehensive Tax information and advice for residents and non-residents. Tax returns, Capital Gains Tax, Inheritance Taxes.....take the headache out of your tax worries!
The Global Property Guide's Overview on Turkey (updated) http://www.globalpropertyguide.com/Europe/Turkey
Flights and travel sites
Skyscanner - find flights direct and indirect, 12 months of the year. Compare by price. Search for cheapest dates in a month or even whole year. http://www.skyscanner.net
Fly Thomas Cook http://book.flythomascook.com/skylights/cgi-bin/skylights.cgi
Aegean Flights - charter flights in summertime http://www.aegeanflights.com/
Pegasus Airlines - Budget airline operating 12 months of the year http://www.flypgs.com/en/
Turkish Airlines http://www.turkishairlines.com/
Easy Jet http://www.easyjet.com/asp/en/book/index.asp?lang=en
Monarch Airlines http://www.monarch.co.uk/
News
Hurriyet Daily News http://www.hurriyetdailynews.com/