The first and foremost of course is the proximity of South Korea and Japan to North Korea.
However, diplomats expect resistance from Russian Federation and fellow veto-wielding power China, particularly given that new measures were only announced on August 5 after North Korea tested its first two intercontinental ballistic missiles in July.
Sirens blared again on Friday in towns like Takikawa in the northernmost main island of Hokkaido, and residents took cover inside, in line with government warnings to seek shelter below ground or in a solid building.
In a statement released by the White House on Tuesday, Trump reiterated that "all options are on the table" when it comes to North Korea.
A launch site in Hwadae-gun, North Hamgyong Province was used for 17 missile launches until April 2009, including the first ballistic missile test in April 1984.
On the other hand, China has played a double game to protect North Korea from the wrath of the United States for a long time.
North Korea on Tuesday flew a potentially nuclear-capable Hwasong-12 intermediate range missile over northern Japan and later called it a "meaningful prelude" to containing the U.S. territory of Guam.
A No 10 spokesman said: "The Prime Minister told Prime Minister Abe the United Kingdom stood shoulder to shoulder with Japan in the face of North Korean aggression".
North Korea has to be stopped and there is little time left before the rogue nation strikes a foreign country.
Tokyo said there was no reported damage from the missile.
Theresa May will have to follow Japanese emergency procedure in the event of a 10-minute warning of a North Korean missile attack.
US disarmament ambassador Robert Wood later said the session had amounted to "a global condemnation and frankly an indictment of North Korea" for violating U.N. Security Council resolutions on its nuclear and ballistic missile programmes. The test was conducted on the coast of Hawaii. They showed two types of new missiles with ranges of 500 miles and 310 miles being fired from truck-mounted launchers.
President Donald Trump, who has warned that the U.S. military is "locked and loaded" in case of North Korean provocation, reacted angrily to the latest missile test, declaring on Twitter that "talking is not the answer" to resolving the crisis over North Korea's weapons programs. -South Korea military exercises, he told the session.