British Foreign Secretary David Cameron has ruled out the possibility of sending Western troops to Ukraine, the BBC reports.

He admitted that "the war will be lost if the allies do not intervene". But when asked whether Western countries should send troops to Ukraine, Cameron said "no".

"We don't want to give Putin such a goal," he said.

The minister said that the UK would use the "NATO architecture" to support Ukraine, but drew a distinction between NATO's mission "for Ukraine" and "in Ukraine."

"I think there's nothing escalatory about saying we're going to help this independent, sovereign country fight back against the aggressor, and we're going to give them all the help we can to do that," he said.

The politician said that next week he will make his second visit to the United States since becoming foreign minister and will call on Congress to provide more financial support that "can change the course of events" in Ukraine.

According to him, NATO will have to work with whoever wins the US election this year, so now is the time to get in "the best shape possible for November" - alluding to candidate Donald Trump's complaints.

"If we can get this money from the US Congress, if we can provide Ukraine with the weapons it needs, if we can show Putin that he can't wait us out, and that Ukraine is going to fight back and win back more of its territory. If we can do all of this, whoever comes to power in November, we will look at the situation in Ukraine and... we will look at the fact that more and more NATO members are spending 2% of their GDP on defense and say: this is a success story. I want to invest in this success," he said.