People are finding it increasingly difficult to keep 1.5 metres distance from each other, new research by the public health institute RIVM has shown.

The figures come from a survey of 64,000 people carried out in the last week of May, before many of the lockdown measures were eased last week.

At the same time, people are felling less threatened by coronavirus and are less liable to feel depressed or frightened than they were when the virus first hit the Netherlands in February, the research showed.

Yet while 84% of people are willing to spend two weeks in quarantine if a member of their household tests positive for Covid-19, 77% of people who had cold symptoms said they had been out of their house and 51% had had visitors, despite the government call to self-isolate.

And just 43% said they would stay home someone they had met later turned out to have Covid-19. The new track and trace guidelines introduced alongside mass testing require all contacts to go into a period of self-isolation.

The overnight coronavirus death toll rose by nine to 6,053, the RIVM said in its latest daily update. Five more people have been hospitalised and 210 have tested positive for the virus.