"I don't believe that solidarity stops at the border. I care as much about a young person unemployed in Motherwell as I do about a young person unemployed here in Manchester.
"We have common bonds, we have deep bonds with each other - the people of Scotland and the people of the rest of the United Kingdom."
Setting out the strength of the links, he said: "If you think about the people of Scotland and the Olympic Games, they weren't cheering on just the Scottish athletes of Team GB, they were cheering on all the athletes of Team GB.
"That's what the SNP don't understand. Why would a party that claims to be left of centre turn its back on the redistribution, the solidarity, the common bonds of the United Kingdom?
"It is up to us, we the Labour Party must be the people who fight, defend and win the battle for the United Kingdom."