Russian President Vladimir Putin visits Turkey today with trade and energy issues set high on the agenda.<br /><br />Russia is Turkey’s main energy supplier and Ankara is Moscow’s second biggest trade partner after Germany. <br /><br />However deep differences over Syria and Crimea could blot proceedings and delay an agreed revision in gas prices.<br /><br />Turkish President Recep Tayyip Erdogan has strongly criticised Russia’s backing for Syrian President Bashar al-Assad. And Turkey has strong links with the Muslim Tatar population in Crimea, which Russia annexed from Ukraine in March.
