Prime Minister David Cameron statement on selfie at Mandela memorial service [Video]

British Prime Minister David Cameron issues statement on selfie photo with US President Barack Obama at Mandela memorial service. The camera moment sent headlines to several newspapers, print and digital alike.
David Cameron gave a brief explanation of his role in the selfie session with Pres. Obama on Tuesday, in South Africa. When asked about international phones and roaming services, Cameron referred to the controversial photo by saying the lines below:

When a member of the Kinnock family asked me for a photograph I thought it was only polite to say yes.

Here is a short video where Cameron mentioned the above phrases:
Now, let's wait for U.S. President Barack Obama's statement on the subject.