Nicola Sturgeon today piled the pressure on Boris Johnson to impose even stricter coronavirus restrictions as she said 'tough decisions' must be taken now 'even if they are unpopular'. The Scottish First Minister defended her decision to introduce tighter rules than in England after she yesterday announced a ban on Scots visiting other people in their own home. Scotland, Wales and Northern Ireland have all put in place restrictions on household mixing indoors but England's rule of six remains in place. There is mounting speculation that the approach taken by Ms Sturgeon could ultimately force Mr Johnson to follow suit and introduce tougher measures as she said governments should 'try to co-ordinate as much as possible across the UK'. Ms Sturgeon has written to Mr Johnson asking him to grant greater freedoms on borrowing to the devolved administrations so they are better equipped to respond to the coronavirus crisis. She told her daily coronavirus briefing in Edinburgh: 'There is an argument… that all of us across the UK should actually be doing even more right now and there is a danger that what starts to hold us back is not the public health analysis but financial limitations.' Downing Street said further households in England may be prevented from mixing indoors in areas of local lockdown but ministers were resisting bringing in a Scottish-style nationwide ban.