Nato secretary general: ‘Our history proves that despite differences – we stand by our core task to protect each other’

As Nato leaders head to London for their two day summit – as the alliance marks its 70th year – questions are being raised over its very existence.

President Trump has accused European countries of failing to pay their own way – while other Nato members have been engaging in some very public infighting.

Earlier I spoke to the Nato secretary general Jens Stoltenberg – I asked him whether in light of the recent disagreements, he expected the next few days to be tough going.