This is a well known scam.
It is nonsense. You are being asked to transfer money and then you will never see him again.
He may well need to show the British authorities that he can support himself in the UK without recourse to public funds or employment but that is not what he will be saying.
Do not send money. You can give money to a dog's home rather than con artists like this who could just do an honest job instead of committing fraud and making allegations of historical sexual abuse.
Run for the hills.
Can I clarify anything for you?