World leaders have called Theresa May to offer their support in the fight against terrorism after 22 people died during an attack at an Ariana Grande concert in Manchester.
German Chancellor Angela Merkel, Irish Taoiseach Enda Kenny and Indian Prime Minister Narendra Modi were among the political leaders to call Downing Street on Wednesday.
The Prime Minister also took calls from Israeli Prime Minister Benjamin Netanyahu, European Parliament president Antonio Tajani and King Salman of Saudi Arabia.
Mrs Merkel told the Prime Minister that "Germany stands with the UK against terrorism".
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Mr Netanyahu, King Salman, Mr Modi, King Abdullah of Jordan and Crown Prince Mohammed bin Zayed of the United Arab Emirates all pledged to work with the UK to help tackle terrorism.
Mrs May's discussion with Mr Kenny addressed his decision to stand down as leader of his party, with a successor due to be elected early next month.
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"The Taoiseach said his deepest sympathies and prayers are with the people of the UK," said a Downing Street spokeswoman.
"Both leaders agreed on the importance of re-establishing an executive in Northern Ireland as soon as possible.
"The Prime Minister thanked the Taoiseach for all he had done to strengthen the relationship between the UK and Ireland, wished him the best for the future and looked forward to continued close co-operation with his successor."
The Prime Minister is due to meet world leaders in Brussels on Thursday for a Nato summit before travelling to Sicily for the G7.
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