“His sister and nieces had volunteered to help so he went to a house near to but separate from his extended family in case their help was needed.
“His sister shopped for the family and left everything outside. At no stage was he or his family spoken to by the police about this matter, as is being reported.
“His actions were in line with coronavirus guidelines. Mr Cummings believes he behaved reasonably and legally.”
Members of the cabinet have also lined up to defend the Prime Minister’s top aide.
Michael Gove, the cabinet office minister, tweeted: “Caring for your wife and child is not a crime.”
Dominic Raab, the foreign secretary, also wrote on Twitter: “It’s reasonable and fair to ask for an explanation on this. And it has been provided: two parents with coronavirus, were anxiously taking care of their young child. Those now seeking to politicise it should take a long hard look in the mirror.”