It's a tale of ruthlessness and intimidation that has dogged one of the most important political relationships of the 21st century almost since it began.

Now Vladimir Putin has spoken out to deny the rumour that he used his pet labrador to frighten Angela Merkel in a remarkable power play at one of their very first meetings.

The incident, which has become infamous in Germany, took place at a meeting at Mr Putin's Sochi residence in 2007.

The story goes that Mr Putin, who had been briefed on Ms Merkel's fear of dogs, brought his black labrador Connie to the meeting.