Boris Johnson has walked out of a live TV interview after being challenged to name the South Korean President, declaring: 'We are not doing a pub quiz.'

The Foreign Secretary invited host Dermot Murnaghan to join him for a quiz in the pub but said he would not do one live on air.

The embarrassing incident was similar to one involving his Labour shadow Emily Thornberry who got into a row over Murnaghan after being asked to name a French minister.

In September, the shadow foreign secretary accused the Sky News host of asking her questions she would not ask a man - prompting today's clash with Mr Johnson.

Boris Johnson walked out of a live Sky News interview after being challenged to name the South Korean President today, declaring: 'We are not doing a pub quiz.'

Mr Johnson was today able to answer that question but refused to go for a second round.

Challenged by Murnaghan to name the French Foreign Minister, he said: 'If you want to have a pub quiz Dermot I'll be very happy to meet you in the pub.

'The French Foreign minister is 'mon ami', Jean-Marc Ayrault. I know him very well!'

He said their relationship proved people across the EU are seeing 'all the exciting things we can do with the Brexit vote'.

But asked a second question on South Korea, Mr Johnson stuttered: 'Ah.. your... We are... We are not getting into a, er, a pub quiz about leaders around, er, leaders around the world,' he said.

'And I will, I'm going to in great respect invite you out to the pub Dermot so that we can take these conversations further.

'I have a terrible feeling if I keep answering you, you will keep coming back with more.

'Have a good morning. See you!'

Mr Johnson was in the middle of an interview about the Government's Brexit strategy when Murnaghan turned to finding out if he knew who senior foreign leaders were

Murnaghan got an answer on who the French foreign minister was but was unsuccessful when he challenged the Foreign Secretary on South Korea

Ms Thornberry lost her temper with Murnaghan in September after he asked her to name prominent foreign politicians.

After failing to name French Foreign minister Jean-Marc Ayrault or even answer what gender South Korean President Park Geun-hye is, Ms Thornberry lashed out at Mr Murnaghan for his 'patronising' questions and claimed he did not ask similar questions of male politicians.

Murnaghan insisted the questions were relevant to her job, which also includes shadowing the new Brexit department.

But an angry Ms Thornberry shot back: 'Let's take this off air because I've got a lot to say to you and I don't think a lot of it ought to be broadcast.'

Scottish Tory leader Ruth Davidson hit out at MS Thornberry, saying there were 'plenty of genuine sexism and mysogyny in politics' but said we 'don't need prominent women debasing the term to cover their own poor performance'.