The Foreign Office in London said it was "concerned by reports of a missile test by North Korea" and was "monitoring the situation closely".
The failed missile came the day after Pyongyang publicly showcased its ballistic arsenal at a giant military parade.
British Foreign Secretary Boris Johnson earlier urged North Korea to abide by UN resolutions and stop its pursuit of nuclear weapons.
"We have been here before but continue to monitor the situation carefully," Johnson said in a statement.
The nuclear-armed state is under United Nations sanctions over its weapons programmes.
North Korea's weapons of war rolled through Pyongyang on yesterday and a senior figure in the regime said it could "beat down enemies with the power of nuclear justice", as leader Kim Jong-Un mounted a spectacular show of strength.
Ostensibly yesterday's event was to mark the 105th anniversary of the North's founder Kim Il-Sung's birth.
Tensions over North Korea's nuclear ambitions are stretched to the limit, with US President Donald Trump deploying an aircraft carrier battle group to the region.
Disclaimer: No Business Standard Journalist was involved in creation of this content
