Ms Rudd smiled for the cameras as she left her home finally looking like she had enjoyed a good night's sleep.
It was a marked change from Sunday, where she was photographed looking tired and stressed as she struggled to get a grip on the Windrush scandal that had engulfed her department.
Theresa May's key ally was forced to resign at the weekend after admitting she had misled Parliament last when she told them there were no targets for deportations.
Sajid Javid was bumped up into her old job yesterday – the first ethnic minority to take up one of the great offices of state.
One source told the Telegraph that Ms Rudd had had her first full night's sleep "for quite a long time" last night – and it clearly showed.
The stress of the job had evidently taken its toll on her, while another added: "You have to pace yourself in this job and she didn't do that."
The ex-Home Secretary had faced a series of problems in Theresa May's old department since she took over.
Alongside a string of terror attacks, a spiralling crime wave and an acid attack epidemic, it emerged in recent weeks that thousands of Brits who had come to the country with their parents in the 1950s and 1960s were at risk of deportation as they hadn't got the right documents to prove they could stay.
Heartbreaking tales of people missing their parents' funerals, being banned from re-entering the country or denied NHS cancer treatment severely damaged Ms Rudd.
Last week she told MPs that there was no such thing as deportation targets, but leaked letters proved they did – and she knew about them.
Mr Javid will now take her place and try to sort out some of the deep rooted issues in the department.
The son of an immigrant bus driver promised to get a grip on the Windrush row, and insisted he would put his "own stamp" on the Home Office.
Yesterday he was already snapped in the same power stance as David Cameron and his old mentor, George Osborne.
The 48-year-old is the first to take up one of the top four jobs in Government – PM, Chancellor, Home Secretary and Foreign Secretary.
Senior Tories have even tipped him for the top role already in the event Mrs May is forced out.
Yesterday he vowed to do "whatever it takes" to reassure Windrush Brits that they could trust ministers and stay in Britain.
He said their plight reminded him of his own relatives, telling MPs: "I thought that it could be my mum, my brother, my uncle or even me."
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