Britain's prime minister, Theresa May, has accepted home secretary, Amber Rudd’s resignation after 200 MPs sign letter accusing her of making up immigration policy ‘on the hoof’.

Amber Rudd has resigned as home secretary, after repeatedly struggling to account for her role in the unjust treatment of Windrush generation migrants.

The home secretary was forced to step down after a series of revelations in the media over Windrush culminated in a leak on Friday that appeared to show she was aware of targets for removing illegal migrants from Britain.

The pressure increased late on Sunday afternoon when media reports appeared of  a leaked 2017 letter to Theresa May, in which Rudd had told the prime minister of her intention to increase deportations by 10% – seemingly at odds with her recent claim  that she was "not aware of deportation targets".

In her resignation letter to the prime minister, Rudd said she had “become aware of information provided to my office which makes mention of targets. I should have been aware of this, and I take full responsibility that I was not.” 

The official reason for Amber Rudd's resignation is that she has taken responsibility for inadvertently misleading the home affairs select committee.

May is expected to announce Rudd’s replacement on Monday, with potential candidates including Sajid Javid, communities minister,  Michael Gove, environment secretary,  Jeremy Hunt, health secretary,  and David Lidington, minister for the Cabinet Office,  who has become a trusted ally of Theresa May, since taking over from Damian Green.