A Downing Street spokesperson said:
The Prime Minister called President Trump earlier this afternoon. She began by offering her condolences over the loss of life in the terrible train crash in Washington state.
They discussed the different positions we took on the recognition of Jerusalem as the Israeli capital, and agreed on the importance of the US bringing forward new proposals for peace and the international community supporting these efforts.
The Prime Minister also raised Yemen, highlighting our ongoing deep concerns at the humanitarian situation. They agreed on the vital importance of reopening humanitarian and commercial access to prevent famine and alleviate the suffering of innocent Yemenis.
The Prime Minister updated the President on the recent good progress of the Brexit negotiations, and the President set out the progress he had made on his economic agenda. They agreed on the importance of a swift post-Brexit bilateral trade deal.
They wished each other a very Merry Christmas and looked forward to keeping in close touch.