This scheme was for children aged 5 to 15, to send them to places like Canada, Australia and New Zealand. It wasn't set up for adults. Adults in Britain didn't flee to other countries when bombs were being dropped on their heads.
The Royal Family stayed in Britain during WW2 because they knew it would look pathetic if they had fled while their subjects stayed.
Therefore I don't feel very sympathetic when I hear that adult males must be accommodated in Britain because they are fleeing war.