Artwork from North Korea typically shows comrades lovingly working for the good of their perfect socialist society, grinning as they lay bricks or oversee bed linen production.

The images sit alongside pictures showing US soldiers as murderous wolves that have been commonly displayed in North Korea for decades.

Until now.

With Kim Jong-un, North Korea's dictator, keen to show improving ties with the old enemy, the anti-American propaganda has recently been removed from view, at least in areas foreigners visit.

Nicholas Bonner, an art collector from Britain who regularly travels in and out of North Korea, told The Sunday Telegraph recent meetings between Mr Kim and Donald Trump have influenced how Americans are depicted internally.

Mr Bonner, who in September is set to release artwork never before seen outside of the rogue state, says he first noticed the change on a tour for Michael Palin, who was filming a documentary, broadcast last year.