In her resignation letter to Boris Johnson, shared on social media, Ms Patel mentioned it was her “alternative” to proceed her public service from the backbenches, when Ms Truss formally takes up her submit as prime minister on Tuesday.

Whereas she pledged her help for the brand new chief, she mentioned it was “important” that she continued to help the insurance policies she had pursued to sort out unlawful immigration – together with the deportation of asylum seekers to Rwanda.

“It has been the honour of my life to function Residence Secretary for the final three years,” she tweeted.

“I’m happy with our work to again the police, reform our immigration system and defend our nation.”

Her departure comes amid studies that Ms Truss is planning to nominate Legal professional Basic Suella Braverman as dwelling secretary when she begins assembling her new cupboard.

Fiercely loyal to Mr Johnson, she was one of many few cupboard ministers to not declare their help for both Ms Truss or her management rival, Rishi Sunak.

Her three years in workplace have been marked by a collection of controversies – not least her makes an attempt to stem the stream of migrants crossing the Channel.

Earlier this 12 months she signed what she described as a “landmark” settlement with Rwanda to ship refugees to the east African state to assert asylum there.

Nevertheless, the primary deportation flight, which had been as a result of take off in June, was grounded amid a collection of authorized challenges and to this point no deportations have taken place.

Since then, the numbers crossing the Channel have continued to rise with the every day whole topping 1,000 for the second time this 12 months on Sunday.

In her letter to Mr Johnson, Ms Patel argued that it was “important” to press on with the coverage, signalling that she would proceed to champion the scheme from the backbenches.

“As we all know, there isn’t any single answer to this large problem and the Authorities should sort out the total spectrum of points to halt the unlawful entry of migrants to the UK,” she mentioned.

Her departure got here after it was introduced that one other ally of Mr Johnson – Tory Celebration co-chairman Ben Elliot – was additionally standing down.