Speaking to the BBC's Today programme, Sir Andrew said: "We've failed another generation of families."
The Ukrainian leader also said: "The failure of Ukraine would not just mean Putin's success, it would be a failure for Europe, it would be a failure for the US."Following the row in the Oval Office, several leading Republicans backed how the meeting had been handled by Trump and criticised Zelensky.
Senator Lindsey Graham - once a staunch supporter of Ukraine - told reporters that Zelensky "either needs to resign and send somebody over that we can do business with, or he needs to change".Asked about these calls to step down in the interest of US-Ukraine relations, Zelensky said that to resign was one thing, but preventing him from running again would require Nato membership.Ukraine joining the transatlantic military alliance has been a demand of Kyiv since the war began, and
- though the Trump administration has said this was unlikely."I am exchangeable for Nato," Zelensky told journalists before he was due to leave the UK.
"I have said that I am exchanging for Nato membership, then it means I have fulfilled my mission. Nato means I have fulfilled my mission."
He added it was "not very democratic" for people from other nations to be deciding who led Ukraine, but said Graham could become Ukrainian and then "his voice will have weight" in deciding who its leader was."My brother was a Royal Marines Commando, the other was a Spitfire mechanic, so I wanted to do something, too," she says.
Eileen, from Sewards End, near Saffron Walden, Essex, was sent to a farm at Takeley, near what is now Stansted Airport, where she lived in a hostel with 16 other girls."Growing up with two brothers, I wasn't used to being with a group of girls, but I absolutely loved it," she says.
Eileen had grown up in the East End of London and left school "with not much of an education" at 14."We lived near the River Thames. When the war broke out, nothing really happened for a few months, and then one Saturday we were sitting around the kitchen table and we heard the planes coming up the river. They started bombing us," she remembers.