"I welcome President Trump's insistence on new sanctions against Iran", Netanyahu said.
"Iran seeks to annihilate Israel.
And it offers provocation after provocation", Netanyahu said in London at a meeting with British Prime Minister Theresa May.
"I'm glad to welcome you especially when we are marking 100 years of the Balfour Declaration", May said as she greeted Netanyahu in front of 10 Downing Street.
Britain was one of the signatories to the 2015 global agreement aimed at curbing Iran's nuclear programme in exchange for the lifting of economic sanctions.
He said he aims to speak to both the British government and the USA, in a visit "next week", about "tightening relations" with Israel.
While waiting outside, the Israeli premier grabbed the opportunity to criticize Iran.
During remarks in London prior to his meeting with May, Netanyahu said Israel faces challenges from "militant Islam" and from Iran. That's why I welcome President Trump's decision to put more sanctions.
Although the meeting will be focused on the relationship between the two countries and bilateral matters of interest, the spokesman said the topic of peace in the middle east is likely to rise between the two leaders. Israel has approved thousands of new homes for illegal settlers on Palestinian land since the inauguration of Trump in the US.
The Israeli government's decision to build 3,000 new settlement homes in the occupied West Bank and East Jerusalem is illegal under global law and a threat to peace and worldwide security. Thousands of Israeli police were sent in to demolish the small settlement of Amona last week because it fell foul of planning laws.
"The prime minister made clear that we support the deal on nuclear that was agreed", the spokeswoman told reporters, when asked whether Britain was considering joining new sanctions. He planned to return to Israel in time to vote for the proposed legislation, he said.
Prime Minister May also is under pressure to condemn Israeli settlement-building in Yehudah and Shomron.
"It undermines still further the prospect of a two-state solution to the Israel-Palestine conflict".