Boris Johnson dismissed calls for indyref2 but Nicola Sturgeon criticised what she called his 'campaign visit' to Scotland.
Boris Johnson will arrive in Scotland on Thursday for the first time since December's general election.
The PM said there has been good co-operation between the four UK nations despite 'surface differences'.
The grey RAF Voyager jet will be painted red, white and blue at a cost of 'around £900,000'.
The PM's spokesman said he has received oxygen treatment but has not yet had to be put on a ventilator.
Boris Johnson said he is 'absolutely confident we can send coronavirus packing in this country'.
The PM has been urged to announce a 'financial package for people' to support them through the coronavirus outbreak.
Boris Johnson called the Covid-19 outbreak 'the worst public health crisis for a generation'.